## EXERCISE 2.2 Prove the following: 2.

MATHEMATICS · Subjective · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

Problem

## EXERCISE 2.2 Prove the following: 2. 3cos⁡−1x=cos⁡−1(4x3−3x),x∈[12,1]3 \cos ^{-1} x=\cos ^{-1}\left(4 x^{3}-3 x\right), x \in\left[\frac{1}{2}, 1\right]

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