Physics, asked by pamulapatilokeshredd, 1 month ago

Prove that cos(72⁰+ )=sin(18⁰ − )

Answers

Answered by ramasha282

3

Explanation:

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Answered by sindhuganaseelan3

1

Answer:

=sin2 72-cos2 18

=(cos90-18) 2-cos2 18

=cos2 18-cos2 18

=0

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