Math, asked by vedantwarade7, 5 months ago

if cos 9a=sin a then the value of a

Answers

Answered by samriti06

2

Answer:

cos9a=sina

Step-by-step explanation:

cos9a=cos(90-a)

9a= 90-a

9a+a=90

10a=90

a=90/10

a=9

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