-2. Find the slope of sides of equilateral triangle ∆ABC whose one side is parallel to y -axis.
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Given : equilateral triangle ∆ABC whose one side is parallel to y -axis.
To Find : slope of sides
Solution:
Slope of line parallel to y axis is 1/0
as angle with x axis is 90 °
other two lines will be inclined at angle of 60°
Hence angle = 90° - 60° = 30°
and 90° + 60° = 150°
Slope = Tan 30° = 1/√3
Tan 150° = -1/√3
Slope of lines = 1/√3 , -1/√3 and 1/0 (∞ )
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