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

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

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

value of (sin9^(@)cos9^(@))/(sin48^(@)sin12^(@)) is equal to :

(sin9^(@)-cos9^(@))/(sin48^(@)sin 12^(@))=

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

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

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

Prove : (cos 9^(@) +sin9^(@))/(cos9^(@) - sin9^(@)) = tan54^(@)

(cos9^(@)+sin9^(@))/(cos9^(@)-sin9^(@))=(a)tan54^(@)(b)tan36^(@)(d) None of these (c)tan18^(@)

If the value of cos9^(@)-sin9^(@)=sqrt(2)sin alpha where a in[0,3 pi], then the value of 'alpha' can be -