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The two lines ax+by=c and a'x+b'y=c' are...

The two lines ax+by=c and a'x+b'y=c' are perpendicular if

A

ab'+a'b=0

B

aa'+b'b=0

C

ab+a'b'=0

D

none of these

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JBD PUBLICATION-STRAIGHT LINES-EXAMPLE
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  5. Find the angle between x-axis and the line joining the points (3,-1) a...

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  6. A line passes through (x1, y1) and (h,k). If slope of the line is m, s...

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  7. Find the value of k for which the line (k-3)x -(4-k^(2))y+k^(2)-7k+6...

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  8. Find the value of k for which the line (k-3)x -(4-k^(2))y+k^(2)-7k+6...

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  9. Find the values of k for which the line (k-3)x-(4-k^2)y+k^2-7k+6=0 is ...

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  10. Find the equation of the straight line which is parallel to the line 2...

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  11. Find the equation of the straight line which is parallel to the line 2...

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  12. Find the equation of the line which satisfy the given conditions. Pas...

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  13. Find the equation of a line that passes through the point (3,-2) and c...

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  14. Reduce the following equations into slope intercept form and find thei...

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  15. Reduce the following equations into slope-intercept form and find thei...

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  16. Reduce the following equations into intercept form and find their inte...

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  17. Reduce the following equations into intercept form and find their inte...

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  18. Prove that the line through the point (x(1),y(1)) and parallel to the ...

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  19. Find the equation of a line through the point (-2,3) and parallel to t...

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  20. Find the equation of the line through point (5,-2) and perpendicular t...

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