If `cos3theta + sin3theta+(2sin2theta-3)(sintheta-costheta) lt 0`, then subset of value of `theta` is
A. `(2npi - (3pi)/(4), 2npi+ pi/4), in Z`
B. `(2npi - (pi)/(2), 2npi + pi/6) , n in Z`
C. `(2n - (pi)/(3), 2npi+pi/3), n in Z`
D. `(2npi - pi/4, 2npi+(3pi)/(4)), n in Z`