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Question
Answer the following question:
Find the equation of the line containing the point T(7, 3) and having inclination 90°.
Solution
Inclination of the line = θ = 90°
∴ slope of the line = tan θ
= tan 90°, which does not exist.
∴ the line is parallel to Y-axis.
∴ its equation is of the type x = a.
If this line is containing the point T (7, 3), the coordinates of this point satisfy this equation.
∴ a = 7
∴ equation of the required line is x = 7.
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