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Find length of perpendicular from origin...

Find length of perpendicular from origin to the lines passes from points `( cos theta , sin theta ) and ( cos phi , sin phi)`.

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The correct Answer is:
`| cos ((theta - phi)/( 2))|`
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KUMAR PRAKASHAN-STRAIGHT LINES-Practice Work
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  4. Find foot of perpendicular from point (2,3) on the line x+y+1=0.

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  5. Find the equation at line passes from point of intersection at lines x...

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  6. Find equation of line passes from point of intersection at lines 4x-3y...

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  7. Find equation of line passes from point of intersection at lines x-y-1...

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  8. If origin is shifted to point (1,-2) then find the new transformed for...

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  9. At which origin will be shifted so, that new coordinate at point (4,5)...

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  10. On which point we shift origin so that new transformed form of the equ...

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  11. Prove that area at triangle will remain same by shifting origin at any...

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  12. By shifting origin at (-2,3) find new transformed form at the equation...

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  13. Find equation of line passes from ( sqrt(3) ,-1) whose perpendicular d...

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  14. Two oppositive verticies of rectangle are (-3,1) and (1,1). Also equat...

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  15. Lines 3x+4y+5=0 and 4x-3y-10=0 intersects at point A. B is the point o...

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  16. Find image of point (-8, 12) with respect to line 4x+7y+ 13=0.

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  17. Two sides of the triangle are along the lines 3x-2y+6=0 and 4x+5y-20=0...

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  18. A(0,-1,-2), B(3,1,4) and C(5,7,1) are vertices of DeltaABD then find t...

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  19. Point (2, 1) has reflection as simple mirror (5, 2). Find equation of ...

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  20. Base of the equilateral triangle is along the line x + y- 2 = 0 and it...

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