Trigonometric Identities
Building trigonometric arguments by manipulating trigonometric identities to show that the Pythagorean identities are true for all values on the unit circle.
Mapped to CCSS Section# HSF.TF.C.8, HSF.TF.C.9
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. Prove the addition and subtraction formulas for sine, cosine, and tangent and use them to solve problems.