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सिद्ध करो कि sin 9^(@) * sin 27^(@) * si...

सिद्ध करो कि `sin 9^(@) * sin 27^(@) * sin 63^(@) * sin 81^(@) = cos 9^(@) * cos 27^(@) * cos 63^(@) * cos 81^(@)`

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"sin" 51^(@)+cos 81^(@)=cos 21^(@) .

Evaluate sin 27 ^(@) sin 63 ^(@) - cos 63^(@) cos 27 ^(@)

(cos 9^(@) + sin 9^(@))/(cos 9^(@) - sin 9^(@)) equals

Find Value of sin27^(@) or cos63^(@)

(sin ^ (2) 63 ^ (@) + sin ^ (2) 27 ^ (@)) / (cos ^ (2) 17 ^ (@) + cos ^ (2) 73 ^ (@))

(cos9^(@) + sin 9^(@))/(cos9^(@) - sin9^(@))=

( sin ^ 2 63 ^@ + sin ^ 2 27 ^@ ) /( cos ^ 2 17 ^@ + cos ^ 2 73 ^@ ) = ?

Prove that sin51^(@)+cos81^(@)=cos21^(@) .

Prove that, sin51^(@)+cos81^(@)=cos21^(@)

(cos 9^@ + sin 9^@ )/( cos 9^@ - sin 9^@ ) =