Inverse Trigonometric FunctionHard

Question

If cos-1x + cos-1y + cos-1z = 3π then the value of xy + yz + zx is equal to-

Options

A.0
B.1
C.3
D.-3

Solution

-

Create a free account to view solution

View Solution Free
Topic: Inverse Trigonometric Function·Practice all Inverse Trigonometric Function questions

More Inverse Trigonometric Function Questions

sin-1+ sin-1 = sin-1x, then roots of the equation are -...sin-1 x + sin-1 + cos-1 x + cos-1=...cos-1 is equal to -...If tan-1 tan-1 x, then x =...cos [cos-1 (√3 / 2) + sin-1 (1 / √2)] is equal to -...