Answer :

Use integration by parts





Let, x = sin t


dx = cos t dt


At x = 0, t = 0


At x = 1, t = π/2





Use integration by parts





Let, …(1)


Use King theorem of definite integral




…(2)


Adding eq.(1) and eq.(2)





Let, 2t = z


2 dt = dz


At t = 0, z = 0


At t = π/2, z = π









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