Helen Melon!!!!!

I'll be going over section 10-2.
In this section it kinda the same thing as section 10.1 but it goes over tan instead.

Formulas:

tan( A+B)= tanA+ tan B/1-tanA tanB

tan( A-B)= tanA- tan B/1+tanA tanB

cot is reciprocal : cot(A+B)= 1-cotA cot B/ cot A+ cot B


Examples:

Ex1: suppose tan a= 1/3 tan b=1/2 . find tan (A+B).

tan A+ tan B/ 1- tan A tan B
=(1/3 + 1/2) /(1-(1/3 )(1/2))
=(2/6 + 3/6)/(1-1/6)
=(5/6)/(5/6)
=1

Ex2: Simplify tan 110 degrees - tan 50 degrees/ 1+(tan 110 degrees)(tan 50 degrees)
=tan (110-50)
=tan 60
= sq. root 3