1.

If sin-1x + sin-1 y = π/3 then the value of cos–1x + cos–1y is equal to which of the following :(A) π/6(B) π/3(C) 2π/3(D) π

Answer» Option (C) is correct

Explanation

sin^-1x+sin^-1y=π/3

=>π/2-cos-^1x+π/2-cos^-1y=π/3

=>cos^-1x+cos^-1y=π-π/3

=>cos^-x+cos^-1y=(2π)/3


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