Writing to Learn Use an appropriately labeled triangle to explain why

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

Problem

64. Writing to Learn Use an appropriately labeled triangle to explain why sin⁡−1x+cos⁡−1x=π/2\sin ^{-1} x+\cos ^{-1} x=\pi / 2. For what values of xx is the left-hand side of this equation defined?

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