Level:
Project ID:
9000086705
Accepted:
1
Clonable:
0
Easy:
1
Identify the optimal substitution which simplifies the following equation as much as
possible.
\[
2\cos (3x + 33^{\circ }) = -\sqrt{2}
\]
\(3x + 33^{\circ } = t\)
\(\sin 3x = t\)
\(3x = t\)
\(3x + 33^{\circ } = -\sqrt{2}\)