10-1

This week we have been taking exams therefore, we have only learned one new lesson which is lesson 10-1. In this lesson we are NOT allowed to use calulators. Lesson 10-1 is showing us how to find the exact values and how to simplify trig functions. So hopefully by now you get that we CAN'T USE CALCULATORS. If not then idk what to tell you.. but I do know your going to fail. Also if you do NOT learn your trig chart you are going to fail.

FORMULAS:
sine(theta+/- beta)=sinetheta*cosbeta+/-costheta*sinebeta
cosine(theta=/-beta)=costheta*cosbeta+/-sinetheta*sinebeta

EXAMPLES:
cos 90 cos 45+ sine 90 sine 45
cos( theta- beta)
cos(90-45)
cos(45)
squareroot(2)/ 2