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If p and q are the lengths of perpendiculars from the origin to the lines x cos θ – y sin θ = k cos 2 θ and x sec θ + y cosec θ = k , respectively, prove that p 2 + 4 q 2 = k 2 |
| Answer» If p and q are the lengths of perpendiculars from the origin to the lines x cos θ – y sin θ = k cos 2 θ and x sec θ + y cosec θ = k , respectively, prove that p 2 + 4 q 2 = k 2 | |