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The value of the expression (sin40^(@))/...

The value of the expression `(sin40^(@))/(sin80^(@))+(sin80^(@))/(sin20^(@))-(sin20^(@))/(sin40^(@))` is

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The value of the expression (sin80^(@)-cos80^(@)) is negative.

(2cos40^(@)-cos20^(@))/(sin20^(@))

(2cos40^(@)-cos20^(@))/(sin20^(@))

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

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

(2cos40^(@)-cos20^(@))/(sin20^(@))=?

sin 40^(@) - sin 80^(@)+ sin 160^(@) =

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

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