From Ramanujan to calculus cocreator 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. With this fourpart installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to find the optimal angle at which to launch a projectile.
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How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Find a slope of a straight line with: Ax + By + C = 0

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Do normal probability calculations on a calculator

How To: Find the Percent Given Two Numbers

How To: Calculate the area of a parallelogram

How To: Find standard deviation

How To: Find and sketch the domain of a multivariable function

How To: Solve equations with the order of operations

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

How To: Evaluate combinations of functions from graphs

How To: Find the perimeter & area of a complex figure

How To: Use and find x & yintercepts in algebra

How To: Remember "greater than" & "less than" symbols

How To: Calculate percent composition for chemistry

How To: Find the formula of a piecewise function given a graph

How To: Divide small numbers by big numbers

How To: Find the area & perimeter of triangles & squares

How To: Find the area of an oblique triangle using formulas

How To: Write a slopeintercept equation given an XY table

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Find a slope of a straight line with: Ax + By + C = 0

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Do normal probability calculations on a calculator

How To: Find the Percent Given Two Numbers

How To: Calculate the area of a parallelogram

How To: Find standard deviation

How To: Find and sketch the domain of a multivariable function

How To: Solve equations with the order of operations

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

How To: Evaluate combinations of functions from graphs

How To: Find the perimeter & area of a complex figure

How To: Use and find x & yintercepts in algebra

How To: Remember "greater than" & "less than" symbols

How To: Calculate percent composition for chemistry

How To: Find the formula of a piecewise function given a graph

How To: Divide small numbers by big numbers

How To: Find the area & perimeter of triangles & squares

How To: Find the area of an oblique triangle using formulas

How To: Write a slopeintercept equation given an XY table
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