If xcos3θ + ysin3θ = sinθcosθ and xcosθ = ysinθ,
then x2 + y2 =
(a) 0
(b) 4
(c) 1
(d) 2
If xcos3θ + ysin3θ = sinθcosθ and xcosθ = ysinθ,
then x2 + y2 =
(a) 0
(b) 4
(c) 1
(d) 2