Answer each of the following questions in one word or one sentence or as per exact requirement of the question:

If 4sin^{–1} x + cos^{–1} x = π, then what is the value of x?

Given 4 sin^{-1} x + cos^{-1} x = π

We know that sin^{-1} x + cos^{-1} x = π/2

∴ x = 1/2