Find the angle between the lines whose direction ratios are a, b, c and b-c, c - a , a - b.

### Question Asked by a Student from EXXAMM.com Team

Q 1815567469.     Find the angle between the lines whose direction
ratios are a, b, c and b-c, c - a , a - b.

#### HINT

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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