The value of \[\cos 52{}^\circ +\cos 68{}^\circ +\cos 172{}^\circ \] is [MP PET 1997; Pb. CET 1995, 99]

The value of \[\cos 52{}^\circ +\cos 68{}^\circ +\cos 172{}^\circ \] i

1.	The value of \[\cos 52{}^\circ +\cos 68{}^\circ +\cos 172{}^\circ \] is [MP PET 1997; Pb. CET 1995, 99]
A.	0
B.	1
C.	2
D.	\[\frac{3}{2}\]
Answer» B. 1

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The value of \[\cos 52{}^\circ +\cos 68{}^\circ +\cos 172{}^\circ \] is [MP PET 1997; Pb. CET 1995, 99]

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