Q5 of 29 Page 1

If 4sin-1x + cos-1x = π, then find the value of x.

Given equation is


4sin-1x + cos-1x = π


We know that:


Hence,



Substitute value of cos-1x in given equation







⇒ x = sin30°


⇒ x = 1/2


Hence value of x is 1/2


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