`log_(t_1) (4 sin9^@ cos 9^@)` ; where `t_1=4sin63^@ cos 63^@`, equals-

(log)_(t_(1))(4sin9^(0)cos9^(0)) where t_(1)=4sin63^(0)cos63^(@) equals a.(sqrt(5)+1)/(4) b.(sqrt(5)-1)/(4) c.1d.none of these

(log)_(t_1)(4sin9^0cos9^0)w h e r e\ t_1=4sin 63^0cos 63^0\ e q u a l s a. (sqrt(5)+1)/4 b. (sqrt(5)-1)/4 c. 1 d. none of these

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

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

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

Evaluate sin 27 ^(@) sin 63 ^(@) - cos 63^(@) cos 27 ^(@)

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

The value of ((cos9^@ + sin81^@) (sec9^@+ cosec81^@)) /(2 sin^2 63^@+1+2sin^2 27^@) is: ((cos9^@ + sin81^@) (sec9^@+ cosec81^@)) /(2 sin^2 63^@+1+2sin^2 27^@) का मान होगा:

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