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cos(-9∏/4)=


cos(-9∏/4)=


Grade:

2 Answers

shivang belwariar
35 Points
9 years ago

cos(-9∏/4)= cos(9∏/4)=  cos(2∏+∏/4) = cos(∏/4) =cos(45) = 1√2

 

 

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Shrawan Kher
14 Points
9 years ago

cos(9pie/4)

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