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

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

Prove that: sin(pi/10)+sin((13pi)/10)=-1/2

Prove that 4sin(pi/10) sin((13pi)/10)=-1

Prove that: sin(pi/10) sin((13pi)/10)=-1/4

Express as sum or difference: 2sin(pi/10)sin((3pi)/4)

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

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

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

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

The value of sin (pi/14). sin((3pi)/14). sin( (5pi)/14)………. Sin ((13pi)/14) is