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Find the equation of the straight line t...

Find the equation of the straight line through the origin making angle `alpha` with the line `y=mx+b` .

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The correct Answer is:
`y=(m-tan alpha)/(1+m tan alpha)*x` or `y=(m+tan alpha)/(1-m tan alpha)*x`
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NAGEEN PRAKASHAN ENGLISH-STRAIGHT LINES-Exercise
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  9. Find the equation of a line passing through the point of intersection ...

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  10. Find the equation of the line passing through (-3,5) and perpendicular...

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  11. The co-ordinates of the vertices of DeltaABC are A(-2,4), B(5,5) and C...

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  12. Find the equation of a line which passes through the point (5,1) and c...

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  13. The co-ordinates of three vertices of a parallelogram ABCD are A(1,0) ...

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  14. The perpendicular drawn from origin to the line y=mx+c meets the line ...

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  15. The perpendicular distance between the lines 3x+4y=6 and 3x+4y+4=0 is ...

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  16. The equation of the perpendicular bisector of line AB is x+2y=8 and th...

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  18. In what ratio, the line joining (1, 1)and (5, 7)is divided by the line...

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  20. The locus of the points of intersection of the lines x cos theta+y sin...

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