" (i) "sin10^(@)sin50^(@)+sin50^(@)sin250^(@)+sin250^(@)sin10^(@)=

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

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

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

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

Prove the following identities: sin10^(@) sin50^(@) + sin50^(@) sin 250^(@) + sin 250^(@) sin 10^(@) = -3/4

sin10^(@)sin30^(@)sin50^(@)sin70^(@)sin90^(@)=

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

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

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