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A tangent is drawn to parabola y^2=8x wh...

A tangent is drawn to parabola `y^2=8x` which makes angle `theta` with positive direction of x-axis. The equation of tangent is (A) `y=xtantheta+2cottheta` (B) `ycottheta=x-2tantheta` (C) `ycottheta=x+2tantheta` (D) `ycottheta=x-tantheta`

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