Math, asked by raokrishnachakri, 1 year ago

cos36cos54_sin36sin54=0

Answers

Answered by redxaditya

1

Answer:

1

Step-by-step explanation:

=cos 36cos54-sin36 sin 54

=cos36cos54-sin(90-36)sin(90-54)

=cos 36-cos 54-cos54cos36

=0

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