Inverse Trigonometric FunctionMedium
Question
The equation 2 cos-1 x + sin-1 x = 
has -
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
cos-1 x +
cos-1 x =
∉ [0, π]⇒ No solution
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