cos^(2)24^(@)-cos^(2)6^(@)

sin^(2)24^(@)-cos^(2)84^(@)=?

cos6^(@)sin24^(@)cos72^(@)=

Find the value of [(sin^2 2 2^(@)+sin^2 6 8^(@))/(cos^2 2 2^(@)+cos^2 6 8^(@))+sin^2 6 3^(@)+cos6 3^(@)sin2 7^(@)]

cos6^(@)*sin24^(@)*cos72^(@)=

" The exact value of "2(cos24^(@)-cos12^(@)+cos48^(@)-cos84^(@))" is "

cos 12 ^(@) cos 24 ^(@) cos 36 ^(@) cos 48^(@) cos 72^(@) cos 84^(@) = (1)/(2 ^(6))

cos 6^(@) sin 24^(@) cos 72^(@) =

(The24^(@)cos6^(@)-sin6^(@)sin66^(@))/(sin21^(@)cos39^(@)-cos51^(@)sin69^(@)) is