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sin10^@+sin20^@+sin40^@+sin50^@=sin70^@+...

`sin10^@+sin20^@+sin40^@+sin50^@=sin70^@+sin80^@`

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Show that: sn10^@+sin20^@+sin40^@+sin50^@=sin70^@+sin80^@

Prove the following : sin 10^@ + sin 20^@ + sin 40^@ + sin 50^@ = sin 70^@+ sin 80^@ .

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

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

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

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

The value of sin20^@ sin40^@ sin60^@ sin80^@

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

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