Inverse Trigonometric FunctionMedium

Question

If x = 2cos-1 + sin-1 + tan-1 (√3) and y = cos then which of the following statements holds good ?

Options

A.y = cos
B.y = cos
C.x = 4 cos-1 y
D.none of these

Solution

x =
y = cos
= cos = cos

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