If , prove that…

MATHEMATICS · Subjective · CBSE · Mathematics · Inverse Trigonometric Functions · Inverse Trigonometric Functions

Problem

If cos⁡−1x+cos⁡−1y+cos⁡−1z=π\cos^{-1}x+\cos^{-1}y+\cos^{-1}z=\pi, prove that x2+y2+z2+2xyz=1x^2+y^2+z^2+2xyz=1.

Related theory

Browse the problem library