Prove that the three lines from the origin O, with direction cosines `l_1,m_1,n_1; l_2,m_2,n_2
367 views · Published 13 October 2018 · 3:49 · Indexed 26 September 2026
Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW Prove that the three lines from the origin O, with direction cosines `l_1,m_1,n_1; l_2,m_2,n_2;l_3,m_3,n_3` are coplaner if `|[l_1,m_1,n_1],[l_2,m_2,n_2],[l_3,m_3,n_3]|`
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