1003086003 | math4u.vsb.cz

SubArea:

Trigonometric equations and inequalities

Level:

Project ID:

1003086003

Accepted:

1

Clonable:

0

Easy:

0

The sum of all

x \in [0^{\circ}; 360^{\circ}]

satisfying the equation

\cos 2 x = \cos x

is:

720^{\circ}

360^{\circ}

480^{\circ}

120^{\circ}