A straight line L makes an angle of 120 with the positive x-axis.
The x-intercept of L is 5. Find the equation of L
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2008-11-13 3:14 am
回答 (2)
2008-11-13 4:11 am
✔ 最佳答案
Slope of L=tan 120°=-√3Let L: y=-√3x+c, since L passes through (5, 0),
thus 0=-√3*5+c, c=5√3
Therefore the equation of L is y=-√3x+5√3.
參考: ME
2008-11-22 3:33 am
The slope of PQ=(10-6)/(-7-1)=-1/2
Thus the slope of the perp. bisector=2
The mid-point of PQ=((-7+1)/2, (10+6)/2)=(-3, 8)
The equation of the perp. bisector is
y-8=2(x+3), i.e. 2x-y+14=0
Thus the slope of the perp. bisector=2
The mid-point of PQ=((-7+1)/2, (10+6)/2)=(-3, 8)
The equation of the perp. bisector is
y-8=2(x+3), i.e. 2x-y+14=0
收錄日期: 2021-04-13 16:14:32
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