Find the angle between the lines whose direction ratios are \( a, b, c \) and \( b-c, c-a, a-b \). VIDEO
Find the angle between the lines whose direction ratios are \( a, b, c \) and \( b-c, c-a, a-b \).https://bit.ly/YTAI_PWAP https://www.pw.live
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\[
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\[
\left(\begin{array}{l}
\vec{b}+\vec{c})
\end{array}\right) \cdot\left\{\left(\beg...
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