Inverse Trigonometric FunctionHard

Question

The equation 2 cos-1 x + sin-1 x = has -

Options

A.no solution
B.only one solution
C.two solutions
D.three solutions

Solution

2cos-1 x + sin-1x =
cos-1 x +
cos-1 x = ∉ [0, π]
⇒ No solution

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