Question

Find the equation of a line passing through the point (2a cos³θ, 2a Sin³θ) and parallel to the line (xsecθ + ycosecθ = 0)
Ans is ( x Sin θ + y cos θ = a sin 2θ) how ???????

Answer 1

so simplifying we get the answer using

2sin theta cos theta=sin2 theta