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Lady_Fox [76]
3 years ago
15

Prove that: sin8A/1-cos8A=cot4A​

Mathematics
1 answer:
nikitadnepr [17]3 years ago
8 0

Step-by-step explanation:

Recall the identity

\tan \frac{A}{2}= \dfrac{1 - \cos A}{\sin A}

We can see that

\dfrac{\sin 8A}{1 - \cos 8A} = \dfrac{1}{\tan 4A}= \cot 4A

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