Given that sin x = 1/2 calculate cos x .

Expert Answers

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sinx = 1/2

We need to calculate cosx.

We know that:

sin^2 x + cos^2 x = 1

==> cosx = sqrt(1-sin^2 x)

               = sqrt(1-(1/2)^2]

               = sqrt(1-1/4)

                = sqrt(3/4) = sqrt3/2

==> cosx = sqrt3/2

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