0-2pi-cos-2-3x-1-2a-cosx-a-2-dx-a-C-1-1-I-need-a-solution-through-complex-analysis-

Question Number 117205 by AbduraufKodiriy last updated on 10/Oct/20

\int_{0}^{2 π} \frac{{c o s}^{2} 3 x}{1 - 2 a \cdot c o s x + a^{2}} d x - ? (a \in C / {- 1; 1})

I n e e d a s o l u t i o n t h r o u g h c o m p l e x a n a l y s i s