Ex 9.1, 7 - Chapter 10 Class 11 Straight Lines (Important Question)

Last updated at July 20, 2026 by

Ex 9.1, 7 - Find slope of line, which makes angle 30 - Ex 9.1 - Ex 9.1

part 2 - Ex 9.1, 7 - Ex 9.1 - Serial order wise - Chapter 9 Class 11 Straight Lines

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Ex 9.1, 7 Find the slope of the line, which makes an angle of 30° with the positive direction of y-axis measured anticlockwise. The line makes angle of 30° from positive y axis Hence it makes angle of (90° + 30°) from positive x axis i.e. 120° from positive x axis Hence θ = 120° Slope = m = tan θ = tan 120° = tan (180 – 60°) = –tan 60° = –√3 Hence, Slope of line = –√𝟑 (tan(180° – 𝜃) = –tan 𝜃)

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