HPC Section 5.3 Day 3

HPC Section 5.3

Day 3 Multiple angles

Multiple Choice

$$\cos^2x-\cos x\ -2\ =\ 0$$  

• $$\pi$$  

• 0

• $$2\pi$$  

• $$\frac{\pi}{3}$$  

• $$\frac{\pi}{2}$$  

Multiple Select

Solve

2 cos 3x - 1 = 0

• $$\frac{\pi}{9}+\frac{2\pi n}{3}$$  

• $$\frac{2\pi}{9}+\frac{2\pi n}{3}$$  

• $$\frac{4\pi}{9}+\frac{2\pi n}{3}$$  

• $$\frac{5\pi}{9}+\frac{2\pi n}{3}$$  
  

Multiple Select

Solve
$$\cot\left(\frac{x}{2}\right)+1\ =\ 0$$  

• $$\frac{3\pi}{4}+\pi n$$  

• $$\frac{3\pi}{2}+2\pi n$$  

• $$\frac{\pi}{2}+\pi n$$