Question

Can you find the value of Sin18°

Answer 1

Hlo friend..

Value of sin18 is 0.309016994

HOPE IT HELPS YOU...

REGARDS
@sunita

Answer 2

HEY MATE✌️✌️✌️

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Solution -:

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☢️Refer the attachment ☢️

Formula used

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