Write the value of cos(2 sin-1\(\frac 12\)). – InterviewSolution

1.

Write the value of cos(2 sin-1\(\frac 12\)).

Answer»

Given cos (2sin^-11/2)

= cos (2× π/6)

= cos (π/3)

= 1/2

∴ cos (2 sin -1 1/2) = 1/2

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