If \[|\mathbf{a}|\,=3,\,\,|\mathbf{b}|\,=4,\,\,|\mathbf{c}|\,=\,\,5\] and \[\mathbf{a}+\mathbf{b}+\mathbf{c}=0,\] then the angle between a and b is [MP PET 1989; Bihar CEE 1994]

If \[|\mathbf{a}|\,=3,\,\,|\mathbf{b}|\,=4,\,\,|\mathbf{c}|\,=\,\,5\]

1.	If \[\|\mathbf{a}\|\,=3,\,\,\|\mathbf{b}\|\,=4,\,\,\|\mathbf{c}\|\,=\,\,5\] and \[\mathbf{a}+\mathbf{b}+\mathbf{c}=0,\] then the angle between a and b is [MP PET 1989; Bihar CEE 1994]
A.	0
B.	\[\frac{\pi }{6}\]
C.	\[\frac{\pi }{3}\]
D.	\[\frac{\pi }{2}\]
Answer» E.

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If \[|\mathbf{a}|\,=3,\,\,|\mathbf{b}|\,=4,\,\,|\mathbf{c}|\,=\,\,5\] and \[\mathbf{a}+\mathbf{b}+\mathbf{c}=0,\] then the angle between a and b is [MP PET 1989; Bihar CEE 1994]

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