In a right triangle with acute angles of measures a and B, cos B = . Find the following values in terms of the lengths of sides a, b, and c: a) sin a b) sec B

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Q: If tan VA – B, then, by using a half-angle formula, find A = B = %3D

A: Here there are two terms at the numerator so using  this formula   where, α=π4

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Q: On your written working, show that for any angles A and B, the following identity holds sin A cos B…

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