CPM Homework Help : PC Problem 6-89

Solve for x on the indicated domain. Homework Help ✎
1. cos x = 0, [0, 2π]
2. 2 sin x + = 0, [0, 2π]
3. cos x(2 sin x + ) = 0, [0, 2π]
4. cos x(2 sin x + ) = 0

Hint (a):

Step (b):

$\text{sin }x=-\frac{\sqrt{2}}{2}$

Hint (c):

Use the Zero Product Property. Then combine parts (a) and (b).

Hint (d):

Solve for all solutions.
Add a 2πn to each solution in [0,2π] where n is any integer.