sin5^(@)+sin10^(@)+sin15^(@)+--sin360^(@)=

sin10^(@)sin50^(@)+sin50^(@)sin250^(@)+sin250^(@)sin10^(@)=-(3)/(4)

sin 10^(@) sin 30^(@) sin 50^(@) sin 70^(@) sin 90^(@)=

value of sin10^(@)sin30^(@)sin50^(@)sin70^(@)

sin50^(@)-sin70^(@)+sin10^(@)=?

(i) sin10^(@)sin50^(@)sin70^(@)

1+ cos 10^(@) + cos 20^(@)+ cos 30^(@)= ............... A) 4 cos 5^(@) cos 10^(@) cos 15^(@) B) 4 cos 10^(@) cos 20^(@) cos 30^(@) C) 4 sin 5^(@) sin 10^(@) sin 15^(@) D) 4 sin 10^(@) sin 20^(@) sin 30^(@)

Solve that : (sin75^(@)+sin15^(@))/(sin75^(@)-sin15^(@))=sqrt(3)

Prove that (sin75^(@)+sin15^(@))/(sin75^(@)-sin15^(@))=sqrt3

sin10^(@)+sin20^(@)+sin40^(@)+sin50^(@)-sin70^(@)-sin80^(@)=