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sin^(2)42^(@)-sin^(2)12^(@)...

sin^(2)42^(@)-sin^(2)12^(@)

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The value of sin^(2)42^(@)+sin^(2)48^(@)+tan^(2)60^(@)-cosec30^(@) is equal to :

Find the value of (a) sin(pi)/(10).sin(13pi)/(10) (b) cos^(2)48^(@)-sin^(2) 12^(@)

cos^(2)48^(@)-sin^(2)12^(@)=?

The value of cos^(2)48^(@)-sin^(2)12^(@) is

The value of cos^(2)48^(@)-sin^(2)12^(@) is

The value of cos^(2)48^(@)-sin^(2)12^(@) is

Prove that sin^(2)42^(@)-cos^(2)78^(@) .

Show that sin^(2) 12^(@)+ sin ^(2)21^(@)+ sin ^(2)39^(@)+ sin^(2)48^(@)=1+ sin^(2)9^(@)+ sin^(2)18^(@)

Prove that: sin^(2)12^(@)+sin^(2)21^(@)+sin^(2)39^(@)+sin^(2)48^(@)=1+sin^(2)9^(@)+sin^(2)18^(@)