1003085801 | math4u.vsb.cz

SubArea:

Trigonometric equations and inequalities

Level:

Project ID:

1003085801

Source Problem:

Accepted:

1

Clonable:

1

Easy:

0

The solution set of the inequality

\cos x > 0.5

for

x \in R

is:

⋃_{k \in Z} (- \frac{π}{3} + 2 k π; \frac{π}{3} + 2 k π)

⋃_{k \in Z} (- \frac{π}{3} + k π; \frac{π}{3} + k π)

⋃_{k \in Z} (- \frac{π}{3} + 2 k π; k π)

⋃_{k \in Z} (- \frac{π}{3} + 2 k π; 2 k π)