sin (90- teta) is equal to​

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If xsin(90^° theta) cot(90^° theta) = cos(90^° theta), then x is

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SOLVED: Assume cos(x) = 3. Find the exact value of cos(2x).

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Prove that : (i) `sinthetacos(90^(@)-theta)+sin(90^(@)-theta

Prove that:sin(90+theta )=costheta

If sin theta + cos theta = sqrt{2 } cos (90^{o}- theta) Determine