Dylans

We learned some new formulas... yay!

Formulas:
tan( A+B)= tanA+ tan B/1-tanA tanB
tan( A-B)= tanA- tan B/1+tanA tanB
Fore cot, you just flip the tan of it:
cot(A+B)= 1-cotA
cot B/ cot A+ cot B

They are pretty easy to remember.

Ex.

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