If \[\cos (\alpha -\beta )=1\] and \[\cos (\alpha +\beta )=\frac{1}{e}\], \[-\pi

If \[\cos (\alpha -\beta )=1\] and \[\cos (\alpha +\beta )=\frac{1}{e}

1.	If \[\cos (\alpha -\beta )=1\] and \[\cos (\alpha +\beta )=\frac{1}{e}\], \[-\pi
A.	0
B.	1
C.	2
D.	4
Answer» E.

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If \[\cos (\alpha -\beta )=1\] and \[\cos (\alpha +\beta )=\frac{1}{e}\], \[-\pi

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