cos9^(@)-sin9^(@)" का मान इात "

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

The value of sin 60^@ cos 30^@-cos 60^@ sin30^@ is: sin 60^@ cos 30^@-cos 60^@ sin30^@ का मान है:

The value of (sin 30^@ sin 60^@)/(cos 60^@ cos 30^@)-tan45^@ is : (sin 30^@ sin 60^@)/(cos 60^@ cos 30^@)-tan45^@ का मान है?

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

(cos9^@+sin9^@)/(cos9^@-sin9^@)= (a) tan 54^@ (b) tan 36^@ (c) tan18^@ (d) None of these

The value of (cos 9^(@) +sin 9^(@))/(cos 9^(@) -sin 9^(@)) is equal to-

(cos 9^(@) + sin 9^(@))/(cos 9^(@) - sin 9^(@)) equals

(cos 9^(@) +sin 9^(@))/(cos 9^(@) -sin 9^(@)) is equal to :

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