1. A quick trig problem

I feel that at my level I really should find this problem easy but i just dont, so i'll really appreciate some help.

Basically I would like to know how (tanθ + tan45)/(1 - tanθtan45) cancels down to (tanθ + 1)/(1 - tanθ).

much Thanx

2. Originally Posted by hopingforhelp
I feel that at my level I really should find this problem easy but i just dont, so i'll really appreciate some help.

Basically I would like to know how (tanθ + tan45)/(1 - tanθtan45) cancels down to (tanθ + 1)/(1 - tanθ).

much Thanx
because $\tan(45^{\circ}) = 1$