Q. 1 C5.0( 1 Vote )

Find the angles between each of the following pairs of straight lines :

3x + 4y – 7 = 0 and 4x – 3y + 5 = 0

Answer :


The equations of the lines are

3x + 4y 7 = 0 … (1)

4x 3y + 5 = 0 … (2)

To find:

Angles between two lines.


Let m1 and m2 be the slopes of these lines.



Hence, the given lines are perpendicular.
Therefore, the angle between them is 90°.

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