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सिद्ध कीजिए कि :(sin36^(@)+cos36^(@))/(c...

सिद्ध कीजिए कि :`(sin36^(@)+cos36^(@))/(cos54^(@)+sin54^(@))=1.`

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Prove that (sin36^(@)+cos36^(@))/(cos54^(@)+sin54^(@))=1

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

cos54^(@)cos36^(@)-sin54^(@)sin36^(@)=0

cos(36^(@)-A)cos(36^(@)+A)+cos(54^(@)+A)cos(54^(@)-A)=

2 cos 54^(@) * sin 66^(@) =

Prove that (sin36^(@))/(cos54^(@))+(cos36^(@))/(sin54^(@))=2

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

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

Evalute (f) (sin36^(@))/(cos54^(@))-(sin54^(@))/(cos36^(@))