Question

why tan45 is 1 ?
please explain me this question.

Answer 1

If ABC is a right angled triangle right angled at B and angle A=45°
So,angle C=45° [angle sum property]
Now tan Thita=p/b
tanA=AB/BC

{AB=BC side opp. To equal angles is equal}

So,tanA=1
Tan45°=1