`(sin(pi/10)+sin((13pi)/10))((cos^2(pi/6)-cos^2(pi/10))`

sin(pi/10)sin((3pi)/10)=

sinpi/10+sin(13pi)/(10)=?

sin((pi)/(10))sin((3pi)/(10))=?

(sin((pi)/(10))+sin(13(pi)/(10)))(cos^(2)((pi)/(6))-cos^(2)((pi)/(10))) is equal to

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

Find the value of following expression: [(1-cos(pi)/(10)+i sin(pi)/(10))/(1-cos(pi)/(10)-i sin(pi)/(10))]^(10)

sin ((pi) / (10)) sin ((3 pi) / (10))

FInd sin(pi/10). cos(pi/5)

(sin ((pi) / (10)) + sin ((13 pi) / (10))) ((cos ^ (2) ((pi) / (6)) - cos ^ (2) (pi) / (10)))

Find the value of (a) sin(pi)/(10).sin(13pi)/(10) (b) cos^(2)48^(@)-sin^(2) 12^(@)