Mathematics

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

$\dfrac {p }{q}$

##### 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
Questions 120418
Subjects 10
Chapters 88
Enrolled Students 86

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