Math, asked by chaurasiyaaditi29420, 5 months ago

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cos 21 = sin ​

Answers

Answered by Anonymous
0

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cos 21 = sin

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Answered by harshitabohra
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Sin x = cos(90-x) or cos x = sin(90-x)
Therefore, cos 21 = sin(90-21) = sin 69
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