Answer in Brief

Find the angle between the lines x = a and by + c = 0..

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#### Solution

The given lines can be written as

x = a ... (1)

\[y = - \frac{c}{b}\] ... (2)

Lines (1) and (2) are parallel to the y-axis and x-axis, respectively. Thus, they intersect at right angle, i.e. at 90^{°}.

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