9000086705 | math4u.vsb.cz

SubArea:

Trigonometric equations and inequalities

Level:

Project ID:

9000086705

Accepted:

1

Clonable:

0

Easy:

1

Identify the optimal substitution which simplifies the following equation as much as possible.

2 \cos (3 x + 33^{\circ}) = - \sqrt{2}

3 x + 33^{\circ} = t

\sin 3 x = t

3 x = t

3 x + 33^{\circ} = - \sqrt{2}