Question

How to find the value of sin18°

Answer 1

I think this would help u

Answer 2

HEY MATE✌️✌️✌️

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Solution -:

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☢️Refer the attachment ☢️

Formula used

$\longrightarrow \: sin2 \theta = 2sin\theta \: cos\theta \\ \\ \longrightarrow \: cos3\theta = \: 4cos {}^{3} \theta - \: 3cos\theta \:$