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Statement 1: The direction cosines of...

Statement 1: The direction cosines of one of the angular bisectors of two intersecting line having direction cosines as `l_1,m_1, n_1a n dl_2, m_2, n_2` are proportional to `l_1+l_2,m_1+m_2, n_1+n_2dot` Statement 2: The angle between the two intersection lines having direction cosines as `l_1,m_1, n_1a n dl_2, m_2, n_2` is given by `costheta=l_1l_2+m_1m_2+n_1n_2dot`

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