(v)(2cos40^(@)-cos20^(@))/(sin20^(@))=sqrt(3)

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sin20^(@)*cos40^(@)+cos20^(@)*sin40^(@)=(sqrt(3))/(2)

Prove that (sin70^(@)-cos40^(@))/(cos50^(@)-sin20^(@)) = 1/(sqrt(3)) .

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(2cos 40^0-cos 20^0)/(sin 20^0)=

Prove that cos20^(@)cos40^(@)-sin5^(@)sin25^(@)=(sqrt(3)+1)/4

What is the value of ((cos40^(@)-cos140^(@)))/((sin80^(@)+sin20^(@))) ?

(cos20^(@)-sin20^(@))/(cos20^(@)+sin20^(@))=tan25^(@)

Prove that cos 20^(@) cos 40^(@) - sin5^(@) sin 25^(@) = (sqrt(3)+1)/(4) .

What is the vlaue of (cos40^(@) - cos140^(@))//(sin80^(@)+sin20^(@))

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