सिद्ध कीजिए की ` sin 51^(@) +cos 81^(@) =cos21^(@) `

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

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

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

Prove that: "sin"51^(@)+cos81^(@)=cos21^(@) .

Prove that :sin51^(0)+cos81^(0)=cos21^(0)

sin21^(@)cos9^(@)-cos84^(@) cos6^(@)=

sin 21^(@) cos 9^(@) - cos 84^(@) cos 6^(@)=

Prove the following : sin 51^@ + cos 81^@ = cos 21^@ .

Prove that : sin 51^0+cos 81^0=cos 21^0

Convert the followng into products: (i) sin 53 ^(@) + sin 21 ^(@), (ii) cos 83^(@) - cos 17^(@), (iii) sin 50^(@)- cos 80^(@)