Math, asked by krish43, 1 year ago

what is the value of cos(-9π/4)

Answers

Answered by vishagh

7

cos(9π/4)

9π/4 can be written as 2π+π/4

So cos(9π/4)=cos(π/4) .....................cos(2π+n)=cos(n)

cos(π/4)=1/√2

Answered by vaishunaidu

0

Step-by-step explanation:

cos(-9π/4)=-1/√2

cos(9π/4)=1/√2

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