The direction ratios of the bisector of the angle between the lines whose direction cosines are l_1, m_1, n_1; l_2,

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Q 2186778677.     The direction ratios of the bisector of the angle between

the lines whose direction cosines are l_1, m_1, n_1; l_2, m_2, n_2

are
A

l_1 + l_2, m_1 + m_2, n_1 + n_2

B

l_1 - l_2, m_1 - m_2, n_1 - n_2

C

l_1 m_2 -l_2 m_1 , m_1 n_2 - m_2 n_1, n_1l_2 -n_2 l_1

D

l_1 m_2 + l_2 m_1 , m_1 n_2 + m_2 n_1, n_1l_2 +n_2 l_1`

#### HINT

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