Unit 8 Lesson 3

Draw

Write out the 3 Pythagorean Identities!

Multiple Choice

Solve $$2\cos x-1=0$$ for x.

• $$x=\frac{\pi}{3},\ \frac{4\pi}{3}$$  

• $$x=\frac{\pi}{3},\ \frac{2\pi}{3}$$  

• $$x=\frac{2\pi}{3},\ \frac{4\pi}{3}$$  

• $$x=\frac{\pi}{3},\ \frac{5\pi}{3}$$  

Multiple Choice

Solve $$\cos x+1=0$$ for x.

•   $$x=0$$  

•   $$x=\pi$$  

•   $$x=\frac{\pi}{2}$$  

•   $$x=\frac{3\pi}{2}$$  

• $$x=0,\ 2\pi$$