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How To: Find partial derivatives of vector-valued functions

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to find the partial derivative of a vector-valued function in linear algebra or vector c...

How To: Find and use VBA code in Microsoft Excel

Whether you're interested in learning Microsoft Excel from the bottom up or just looking to pick up a few tips and tricks, you've come to the right place. In this tutorial from everyone's favorite digital spreadsheet guru, ExcelIsFun, the 54th installment in his "Highline Excel Class" series of free video Excel lessons, you'll learn how to find, download and use VBA code in your MS Excel projects.

How To: Use the INDEX & MATCH functions in Microsoft Excel

Whether you're interested in learning Microsoft Excel from the bottom up or just looking to pick up a few tips and tricks, you've come to the right place. In this tutorial from everyone's favorite digital spreadsheet guru, ExcelIsFun, the 45th installment in his "Highline Excel Class" series of free video Excel lessons, you'll learn how to use the INDEX & MATCH functions.

How To: Get out of the map/demo barrier in the Skate 3 demo

In this tutorial brought to you by the guys at Achievement Hunter, you'll be finding out a secret in the Skate 3 demo. This video shows you how to get out of the map, or in this case demo barrier, into another skating area. This is the main place where you can find the infamous shark that is so difficult to jump. Enjoy!

How To: Find the "Baby" Panay easter egg in Just Cause 2

The cool thing about Just Cause 2, is not only do you play a shoot first, ask questions later type of character, but the game is stocked with a lot of hidden secrets. Or as they are referred to, easter eggs. This video tutorial is presented by the guys at Achievement Hunter and they show you how to find the "Baby" Panay Moustache easter egg. It's easy to find and involves some interesting art. Enjoy!

How To: Find statistical critical & p values in MS Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 89th installment in his "Excel Statistics" series of free video lessons, you'll learn how to use the NORMSINV function for critical values and the NORSDIST function for p-values.

How To: Find confidence intervals with a sigma value in Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 80th installment in his "Excel Statistics" series of free video lessons, you'll learn how to construct confidence intervals when the sigma is known known using the CONFIDENCE and NORMSINV functions.

How To: Play Diwaniya, Iraq on Splinter Cell: Conviction

Take a trip into the past as Sam Fisher gets captured by terrorists in the Iraq War. Instead of playing as Sam, you'll be playing the part of Victor Coste — the only man Sam trusts. Find out how Coste saved Fisher's life in this walkthrough for the Diwaniya, Iraq (Mission 4). What happens that day in Diwaniyah? Find out.

How To: Add rational numbers

Learn how to add rational, or fractional, numbers by following the tutorial in this video. In the case of fractions where the denominators are the same, the addition is simple: you simply add the numerators and keep the denominator the same. When the denominators are not the same, you need to find the least common denominator (or multiple). Take a look at your denominators and test different numbers to find the smallest multiple of the two. Then, convert the two original fractions so that the...

How To: Find dates with Microsoft Excel's WORKDAY function

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 372nd installment in their series of digital spreadsheet magic tricks, you'll learn how to find the end date for a specified event with the WORKDAY function given a start date, number of workdays and non-included days.

How To: Find & replace all instances of a word/number in Excel

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 160th installment in their series of digital spreadsheet magic tricks, you'll learn how to find all the occurrences of a word, number, format or formula and then change or replace all of them! See how to use the Find and Replace feature in Excel with this free video tutorial.

How To: Find the average value of a function over an interval

When you have to find the average of two or five numbers then you have to add all the numbers and then divide then by two or five respectively. However in the case of the function you have infinite many values over any interval. But it is not possible to add all and then divide by infinity. Therefore you have to calculate in a different way. Imagine that you have to find the average of y=f(x). Then you have to average it from the interval from ‘a’ to ‘b’. The inner area under the curve shall ...

How To: Use and find x & y-intercepts in algebra

A straight line can be represented in the form of a liner equation containing two variables x and y. When the equation is graphed on a pair of coordinate axes, the line passes cut through the axes in two points. The point where the line cuts the x-axes is called as its x coordinate and the point where the line cuts the y-axes is called as its y coordinate. In this way a line has x-intercept and y-intercept. The x-intercept of a line lies on x axes and is in the form (a,0). Similarly the y-int...

How To: Operate the Blackberry 8330

Learn how to operate the latest Blackberry 8330 in simple steps. Follow the steps below to overview the Blackberry 8330: 1. First switch on your Blackberry by pressing the power button on its top. 2. Use the 'Trackball' to navigate around the menu options and press it to select an option. 3. The 'Send' can be used to call a contact, the 'Menu' key opens a list of options, then the 'Escape' key is used to end an application and the 'End' key is used to end a call. 4. You can find on the left s...

How To: Recover deleted podcasts on iTunes

Veronica Belmont from Tekzilla shares a tip for finding lost podcasts without unsubscribing and resubscribing to the feed. To do this by a simple keyboard combo fist close the disclosure triangle so that the individual episodes are hidden, then hold down the 'Option key' in Mac or 'Shift' in Windows and toggle the disclosure triangle as shown. The iTunes feed will refresh and all the past episodes will reappear. Combine this with the "Get All" button to find lost podcasts.

How To: Find the distance between two points

The user tries to explain to us how to find the distance between two points. It should be noted that we are not talking about using a ruler to measure the distance between two points. The video creator is talking about the math problem that involves finding distance between two points. He uses an electronic white board to explain to us how this is done. He goes step by step and uses a basic equation to help the viewer understand these concepts.

How To: Find a missing part of a triangle, similar to another

In this tutorial the author shows how to find out the missing part of a triangle that is similar to another triangle. He explains the concept of similar triangle diagrammatically by showing that similar triangles have similar angles and parallel sides. Now he labels sides of similar triangles and marks the value of unknown side as variable x. Now in similar triangles as the lengths of sides of proportionate he shows how to write a equation of proportion and solves it finding the missing part ...

How To: Find a missing angle outside of a triangle

For people who are having problems with certain parts of geometry, this video will offer you advice on how to find a missing angle on the outside of a triangle when you are provided with the measurements of the other two angles in the triangle. Since the sum of the angles in a triangle is always 180 degrees, you should first take the sum of the other two angles and then subtract this from 180 in order to find the measurement of the missing angle in the triangle. Next, since there are also 180...

How To: Find y-intercept with an equation in point slope form

In this tutorial the instructor shows how to find the Y-Intercept given the equation of the line in Point-Slope form. He shows how to do this with an example. He tells to substitute the value of x to zero to find out Y-Intercept as Y-Intercept is nothing but the point where the line meets x-axis, where the value of x co-ordinate is zero. By watching this simple tutorial you can easily compute the Y-intercept of an equation in point slope form.

How To: Find the volume of a cone

For anyone who is learning geometry and would like to learn or to review how to find the volume of a cone, this is the video for you to watch. The video provides you with both the simple formula for a cone as well as various examples which you can use to practice. The formula for finding the volume of a cone is 1/3 x pi x r^2 x h, where r is the radius of the base circle of the cone and h is the height of the cone.

How To: Find the surface area of a cylinder easily

In this video tutorial the author shows how to find the surface area of a cylinder. He shows a four step approach to solve this problem. First he gives us a formula to find the surface area of a cylinder, where Surface area A = 2 * Pi * R * R + 2 * Pi * R * H, where R is the radius of the base of the cylinder and H is the height of the cylinder. Now he identifies those values and substitutes them in the formula giving the surface area of the cylinder. This video shows how to compute the surfa...

How To: Use the ratio formula to find coordinates of a point

This video is recorded in a mathematics class room. It is very clear by the sound and picture. The faculty here is explaining that the ratio between two numbers can be found using various formulae and methods. For example, 3:1 is the ratio between p and q. Likewise he explained the other formulae and methods.

How to Walkthrough Darksiders: Iron Canopy - Silitha's Heart

After beating Silitha, you'll have to return its heart. Watch this walkthrough of Darksiders on the Xbox 360. After Silitha's death, you'll find yourself in a cave two levels below where you originally fought her. Use the Crossblade to hit the crystal blade on the rock platform to make it rise and fall through the hole Silitha made. It will go up and down twice. Use the Abyssal Chain to ride it up to the middle level (one below the original) and here you'll find a Soul Chest and an Artifact. ...

How to Walkthrough Darksiders: Twilight Cathedral- Revisit SG

Make sure to detonate the bomb growth in this level for the Xbox 360 game Darksiders, section Twilight Cathedral - Revisit Scalding Gallow. Upon defeating Tiamat, War will find himself back out front of the cathedral. Go speak to Vulgrim to learn about Serpent Holes. These allow you to "fast travel" back to previously visited places, as long as you've found Vulgrim in these places. Make you way back to the Scalding Gallow and go talk to Samael who sits on a throne in the middle area where you...

How to Walkthrough Darksiders: The Choking Grounds

You must complete four shadow arena challenges in this level of the Xbox 360 game Darksiders. In the Choking Grounds, there's the Speed Brawl, Aerial Brawl, Venomous, and the Gory End. Once you enter the Chocking Grounds, head straight ahead and into the gazebo-like structure to find Vulgrim. Make some purchases and then set out to venture around this new area. Explore the cemetery around Vulgrim and destroy 7 of the cross tombstones you find here. Now head back by the entrance to these groun...

How to Walkthrough Darksiders: The Broken Stair

Face off against Hellion in this level of the Xbox 360 game Darksiders. In the Broken Stair, you need to find the soul chest and the beholder's key. Upon exiting the Choking Grounds tunnel you'll find yourself back out in the streets of the Broken Stair area. Head up the street and look for the pit along the right side. Drop into it and you'll find an Artifact at the edge of a cliff within this chasm. Head back up to street level and make your way towards the building to the southeast corner ...

How To: Find r-value & equation of regression line w/ EL531W

Need a little help in your Statistics class? In this statistics tutorial hosted by The Free Math Tutor, a demonstration of how to use the Sharp EL531W calculator to find the correlation coefficient (r-value) and the equation of a regression line is given. Want some more practice? For exercises and answer sheets, go here.

How To: Calculate standard deviation

Looking to find the standard deviation of your set of values? Standard deviation quantifies how diverse the values of your data set are, and is useful in determining how different your numbers are from each other.