INFINITE SERIES 



139 



6.820 



[- 



n = i 



00 



6.822 



6.823 cos 2x - fc - Ain 2 x + sin 2 x log ( 4 sin' ) = V * 2(11+1)* 



\2 / ^ ( + i) 



[o ^ x ^ TT]. 



6.824 sin 2# (TT 2^) sin 2 # - sin * cos x log (4sin 2 x) 



00 



sin 



* one COS 2nx 



6.825 - - - sin x 



2 4 " ^^ (2W i) (2H + i) 



n= i 



[ * x< f 1 



6 . 8 30 



