`((cos\ pi/15+isin\ pi/15)^(10)+(cos\ pi/15-isin\ pi/15)^(10))/((cos\ pi/3+isin\ pi/3)^6)=-1`

-2(cos(pi/3)+isin(pi/3))=?

((1+cos. pi/8+isin. pi/8)/(1+cos. pi/8- isin. pi/8))^(8)=

(cos(pi/6)+isin(pi/6))^7=?

cos(pi/4)+isin(-pi/4)=?

z=cos(pi/6)+isin(pi/6)=?

The value of (cos(pi/10)+isin(pi/10))(cos((2pi)/10)+isin((2pi)/10))(cos((3pi)/10)+isin((3pi)/10))(cos((4pi)/10)+isin((4pi)/10)) is

"cos(pi/15)cos((2pi)/15)cos((4pi)/15)cos((8pi)/15)=k

The value of (cos"" (pi)/(2)+isin ""(pi)/(2))(cos ((pi)/(2^2))+isin((pi)/(2^2))) (cos ((pi)/(2^3))+isin((pi)/(2^3)))" ………."oo is