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

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

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

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

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

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

The value of 2"sin"^(2)(pi)/(6)+"cosec"^(2)(7pi)/(6)."cos"^(2)(pi)/(3) is equal to

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

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

cos2^(3)((pi)/(10))cos2^(4)((pi)/(10))cos2^(5)((pi)/10)....cos2^(10)((pi)/10) is equal to A. (1)/(128) B (1)/(256) C (1)/(512)sin(pi)/(10) D (sqrt(5)-1)/(512)sin(3 pi)/(10)

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