[" 3.(i) "sin10^(@)+sin20^(@)+sin40^(@)+sin50^(@)],[=sin70^(@)+sin80^(@),]

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Explore conceptually related problems

sin20^(@)+sin40^(@)-sin80^(@)=

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

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

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

Prove that sin10^(@) + sin20^(@) + sin 40^(@) + sin 50^(@) = sin 70^(@) + sin 80^(@)

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

sin20^(@)sin40^(@)sin60^(@)sin80^(@)

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

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