`sec(pi/4)sin(3pi/(20))+sin(pi/(10))-cos(pi/(10))` equals

sin(pi/10)sin((13pi)/10)=

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

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

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

sin (pi/2) = 2 sin(pi/4) cos (pi/4)

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

The value of 4cos((pi)/(10))-3sec((pi)/(10))-2tan((pi)/(10))is equal to

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

The value of ((cos pi)/(30)*(cos(3 pi))/(10)*(cos(11 pi))/(30))^(2)+((sin pi)/(30)*(sin(3 pi))/(10)*(sin(11 pi))/(30)) is equal to