Q. 585.0( 2 Votes )

# Answer each of the following questions in one word or one sentence or as per exact requirement of the question:If , find the value of x.

Answer :

Given cos (sin-1 2/5 + cos-1 x) = 0

cos (sin-1 2/5 + cos-1 x) = cos (π/2)

sin-1 2/5 + cos-1 x = π/2

We know that sin-1 x + cos-1 x = π/2

x = 2/5

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