`cos(alpha-beta)=1a n dcos(alpha+beta)=l/e ,`where `alpha,betamu in [- – InterviewSolution

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1.	`cos(alpha-beta)=1a n dcos(alpha+beta)=l/e ,`where `alpha,betamu in [-pi,pi]`. Number of pairs of `alpha,beta`which satisfy both the equations is0 (b)1 (c) 2(d) 4
Answer» `cos(alpha-beta)=1` `cos(alpha-beta)=cos0` `alpha-beta=0` `alpha=beta` `cos(alpha+beta)=1/e` `cos2alpha=1/e` `alpha=beta=4` Option D is correct.

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