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32sin^6 15^@-48sin^4 15^@+18sin^2 15^@=...

`32sin^6 15^@-48sin^4 15^@+18sin^2 15^@=`

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sin 15^(@)=

sin^2 75^@-sin^2 15^@ =

32sin^(6) 15^@ -48 sin^(4) 15 ^(@) + 18 sin^2 15^@ =

sin 75^(@) + sin 15^(@) =

sin^(2) 75^(@) - sin^(2)15^(@)=

(iii)Prove that (cos15^@-sin 15^@)/(cos 15^@+sin 15^@)=tan 30^@ .

sin 15^(@) + cos 105 ^(@) = ............ A) 0 B) 2 sin 15 ^(@) C) cos 15^(@) + sin 15^(@) D) sin 15^(@) - cos 15^(@)

(cos 15^(@) + sin 15^(@))/(cos 15^(@) - sin 15^(@)) =