Mathematics · supplementary
Inverse cosine sum relation for JEE
Inverse trigonometrical functions and their properties
Formula
\(\cos^{-1}x+\cos^{-1}y=\cos^{-1}\left(xy-\sqrt{(1-x^2)(1-y^2)}\right)\)
Variables: \(x,y\in[-1,1]\).
Conditions: Subject to principal value consistency.
Advanced inverse-cosine simplification.