1.

क+ 005 ए +cos _Sn =0हटना बे 13 13

Answer»

2cospi/13cos9pi/13+ cos3pi/13 + cos 5pi/13 = cos10pi/13+ cos3pi/13 + cos8pi/13+cos5pi/13 = 2cospi/2 cos7pi/26 + 2 cos pi/2 cos3pi/26=2(0) cos7pi/26 + 2(0) cos3pi/26=0



Discussion

No Comment Found