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" 14.Prove that "cos9^(@)+cos9^(@)=sqrt(...

" 14.Prove that "cos9^(@)+cos9^(@)=sqrt(2)sin54^(@)

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sin9^(@)+cos9^(@)=sqrt(2)sin54^(@)

Prove that :cos9^(0)+sin9^(0)=sqrt(2)sin54^(@)

cos9^(@)-sin9^(@)=

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

Prove that : cos 9^0 + sin 9^0 = sqrt(2) sin 54^0

sin36^(@)+cos36^(@)=sqrt(2)cos9^(@)

Prove that (cos9^(@)+sin9^(@))/(cos9^(@)-sin9^(@))=cot36^(@)

Prove that (cos9^@+sin9^@)/(cos9^@-sin9^@)=tan54^@

" Prove that "(cos9^(0)+sin9^(0))/(cos9^(0)-sin9^(0))=cot36^(@)

Prove that sin 36^(@) + cos 36^(@) = sqrt(2) cos 9^(@)