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3 years ago

In this figure, sin(a) = 23

Mathematics

1 answer:

WITCHER [35]3 years ago

4 0

$a$ and $b$ are complementary, or $b=\dfrac\pi2-a$ . So

$\cos b=\cos\left(\dfrac\pi2-a\right)=\sin a$

and so $\cos b=\dfrac23$ .

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Step-by-step explanation:

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