Question

12. (Cos 17ᵒ + Sin 17ᵒ) / (Cos 17ᵒ - Sin 17ᵒ) is eqal to

Answer 1

Step-by-step explanation:

Let x =( cos 17 + sin 17 ) / ( cos 17 - sin 17 )

Dividing numeratote s denominator by cos 17

= ( 1 + tan 17 ) / ( 1 - tan 17 )

we know tan 45 = 1

= ( tan 45 + tan 17 ) / ( 1- tan 45 tan 17 )

tan (A+B) = tan a+ tan B/ 1 - tan A. tan B.= tan 62