10-2

This week we are working in chapter 10. Chapter 10 section 2 is about plugging into one side of the formula when given an another one. They have many different formulas that you will need to learn in order to figure out the problems. Also you will need to know how to find the reference angle and also you will once again need to know your trig chart. If you don't know these things you will fail once again.

FORMULAS:
tan(alpha+beta)= tanalpha+tanbeta/1-tanalphatanbeta
tan(alpha- beta)= tanalpha-tanbeta/1+tanalphatanbeta

*cot is the reciprocal
i.e. cot(alpha+beta)=1-cotalphacotbeta/cotalpha+cotbeta
ect...

EXAMPLE:
simplify
tan90-tan60/1+tan90tan60
tan(90-60)
tan(30)
answer:squareroot(3)/3