9000046609 | math4u.vsb.cz

SubArea:

Trigonometric equations and inequalities

Level:

Project ID:

9000046609

Accepted:

1

Clonable:

0

Easy:

0

Identify an inequality which is true for every

x

from the interval

(\frac{π}{4}; \frac{3 π}{4})

.

\sin x \geq \frac{\sqrt{2}}{2}

tg x > 1

\cos x > 0

cotg x \geq \frac{\sqrt{3}}{3}