The vector \[\mathbf{a}+\mathbf{b}\] bisects the angle between the vec

1.	The vector \[\mathbf{a}+\mathbf{b}\] bisects the angle between the vectors a and b, if
A.	\[\|\mathbf{a}\|\,=\,\|\mathbf{b}\|\]
B.	\[\|\mathbf{a}\|\,=\,\|\mathbf{b}\|\] or angle between a and b is zero
C.	\[\|\mathbf{a}\|\,\,=m\,\|\mathbf{b}\|\]
D.	None of these
Answer» C. \[\|\mathbf{a}\|\,\,=m\,\|\mathbf{b}\|\]

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The vector \[\mathbf{a}+\mathbf{b}\] bisects the angle between the vectors a and b, if

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