Two perpendicular lines PQ and QR intersect at (1, -1). If the equation of PQ is x - 2y + 4 = 0, find the equation of QR
P is on the locus of points equidiatant from two given points X and Y. UV is a straight line throuh Y parallel to the locus. If < PYU is 40°, find < XPY.
The derivative of cosec x is
For what value of x is the tangent to the curve y = x\(^2\) - 4x + 3 parallel to the x-axis?