Math, asked by 123jeonjungkoook, 1 day ago

if sin a=cos a,then cos 2a is equal to

Answers

Answered by rashscorpio

1

Answer:

0

Step-by-step explanation:

sin a = cos a

find cos 2a

we know sin and cos have the same value on the same angle of 45

sin 45 = cos 45 = 1/underoot 2

since A = 45

cos 2a = 90

cos 2a = 0

hope it helps

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