Math, asked by 9848825080, 1 year ago

show that cos36° cos54°- sin36° sin54°=0

Answers

Answered by Anonymous

20

cos(54+36)= cos90= 0

Answered by anmoldwivedi123

39

=Cos(90-54) cos54 - sin36 sin(90-36)
=Sin36 Cos54 - Sin36 Cos54=0

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