Ir A 45° then find the valuce of cos A. – InterviewSolution

1.	Ir A 45° then find the valuce of cos A.
Answer» Given A=45 degre To find:Cos^2 ASolution:cos 45degree=1/ root 2Now cos ^2 A=cos ^2 45 degree= 1/ root 2 * 1/ root 2=1/2

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