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Understanding the process for solving linear equations
By Khan Academy
Understanding the process for solving linear equations
Find inverse values of functions
By Khan Academy
Sal explains that if f(a)=b, then f^-1(b)=a, or in other words, the inverse function of f outputs a when its input is b.
Understanding angle addition formulas
By Khan Academy
Sal proves the identity sin(x+y) = sin(x)*cos(y) + cos(x)*sin(y).
The fundamental theorem of algebra
By Khan Academy
The proof of the Fundamental Theorem of Algebra for any degree of polynomial is really tough. For now, let's note that it indeed holds for polynomials of the second degree (i.e. quadratics).
Unit vectors
By Khan Academy
Learn what a unit vector is and how to find a unit vector in the direction of a vector.
Types of statistical studies
By Khan Academy
Understanding why correlation does not imply causality (even though many in the press and some researchers often imply otherwise)
Writing expressions with variables and parentheses
By Khan Academy
Like other exercises in this tutorial, we're rewriting statements into algebraic expression. This time we have to choose which is the correct one among those given.