Mathematics

If $$\alpha , \beta$$ are complementary angles and $$\sin \alpha =\dfrac { p }{ q}$$, then $$\cos \beta =$$


ANSWER

$$\dfrac {p }{q}$$


SOLUTION
$$cos\beta =\cos\left( \pi /2-\alpha  \right) =\sin\alpha =p/q\quad \left[ A \right] $$
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Single Correct Medium Published on 09th 09, 2020
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