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" 6."[" 6.Prove that "],[" fit "sin51^(@...

" 6."[" 6.Prove that "],[" fit "sin51^(@)+cos81^(@)=cos21^(@)]

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

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

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

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

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

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

Prove that sin21^(@)cos9^(@)-cos84^(@)cos6^(@)=1/4 .

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

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

Prove that, sin^(6)x + cos^(6)x = 1-3/4 sin^(2) 2x.