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" Simplify "cos100^(@)cos40^(@)+sin100^(...

" Simplify "cos100^(@)cos40^(@)+sin100^(@)sin40^(@)

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Simplify cos 100^(@) cos 40^(@) +sin 100^(@) sin 40^(@)

Simplify cos 100^(@) cos 40^(@) + sin 100^(@) sin 40^(@) .

cos70^(@)+sin40^(@)=

cos70^(@)+sin40^(@)=

cos20^(@)cos40^(@)-sin5^(@)sin25^(@)=

cos100^@cos10^@+sin100^@sin10^@=

(sin70^(@)+cos40^(@))/(cos70^(@)+sin40^(@))

(sin70^(@)+cos40^(@))/(cos70^(@)+sin40^(@))=