2010009805 | math4u.vsb.cz

SubArea:

Trigonometric equations and inequalities

Level:

Project ID:

2010009805

Source Problem:

Accepted:

0

Clonable:

1

Easy:

0

The solution set of the inequality

| \cos x | \leq \frac{1}{2}

for

x \in R

is:

⋃_{k \in Z} [\frac{π}{3} + k π; \frac{2 π}{3} + k π]

⋃_{k \in Z} [- \frac{π}{3} + k π; \frac{π}{3} + k π]

⋃_{k \in Z} [\frac{π}{3} + k π; \infty)

⋃_{k \in Z} [\frac{π}{3} + k π; \frac{4 π}{3} + k π]