1.

Prove that (A) 2tan-¹[(1+x)/(1-x)] + sin-¹[(1-x²)/(1+x²)] = π(B) tan(sin-¹x+sin-¹y)+tan(cos-¹x+cos-¹y) = 0

Answer» Prove that
(A) 2tan-¹[(1+x)/(1-x)] + sin-¹[(1-x²)/(1+x²)] = π
(B) tan(sin-¹x+sin-¹y)+tan(cos-¹x+cos-¹y) = 0


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