" 13."quad sin(pi)/(10)*sin(13 pi)/(10)" is equal to: "

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

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

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

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

The value of sin(pi)/(14)sin(3 pi)/(14)sin(5 pi)/(14)sin(7 pi)/(14)sin(9 pi)/(14)sin(11 pi)/(14)sin(13 pi)/(14) 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

The value of sin (pi)/(10) sin (13 pi)/(10) is

sin(9pi)/14sin(11pi)/14sin(13pi)/14 is equal to

(sin(9 pi))/(14)(sin(11 pi))/(14)(sin(13 pi))/(14) is equal to