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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.
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