High School: Functions


Prove the Pythagorean identity sin2(θ) + cos2(θ) = 1 and use it to find sin(θ), cos(θ), or tan(θ) given sin(θ), cos(θ), or tan(θ) and the quadrant of the angle.

October 1, 2018

(+) Prove the addition and subtraction formulas for sine, cosine, and tangent and use them to solve problems.

October 1, 2018

Recognize situations in which one quantity changes at a constant rate per unit interval relative to another.

October 1, 2018