Double and Half Angle Identities

HPC

Section 5.5

Half Angle Identities​

Multiple Select

 Find the exact value of : $$\sin\ \frac{\pi}{8}$$  

• $$\sqrt{\frac{1-\sqrt{2}}{2}}$$  

• $$\frac{\sqrt{2-\sqrt{2}}}{2}$$  

• $$\frac{\sqrt{4-\sqrt{2}}}{2}$$  

• $$\frac{2-\sqrt{2}}{4}$$  

Multiple Select

Solve for x: ( $$.$$  

$$\cos^2x=\sin^2\frac{x}{2}$$  

• $$\frac{\pi}{3}$$  

• $$\frac{5\pi}{3}$$  

• $$\pi$$  

• $$0$$  

• $$\frac{2\pi}{3}$$  

Day 2:

Page 390 - 391

# 11, 13, 28, 52, 53, 55, 57(cos only), 59(tan only), 67

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​Why do we drive on parkways and park in driveways?

​Homework