In a \[\Delta ABC\], if \[{{c}^{2}}+{{a}^{2}}-{{b}^{2}}=ac\], then \[\angle B=\] [MP PET 1983, 89, 90]

In a \[\Delta ABC\], if \[{{c}^{2}}+{{a}^{2}}-{{b}^{2}}=ac\], then \

1.	In a \[\Delta ABC\], if \[{{c}^{2}}+{{a}^{2}}-{{b}^{2}}=ac\], then \[\angle B=\] [MP PET 1983, 89, 90]
A.	\[\frac{\pi }{6}\]
B.	\[\frac{\pi }{4}\]
C.	\[\frac{\pi }{3}\]
D.	None of these
Answer» D. None of these

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In a \[\Delta ABC\], if \[{{c}^{2}}+{{a}^{2}}-{{b}^{2}}=ac\], then \[\angle B=\] [MP PET 1983, 89, 90]

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