|
De oplossingen-verzameling van
cos 2x + cos x = 0 is |
A. \(\{\frac {\pi}3+k.\frac {2\pi}3\}\) |
|---|---|
| B. \(\{\frac {\pi}3+k.\frac {2\pi}3\,,\;k.2\pi\}\) | |
| C. \(\{\pm\frac {\pi}3+k.\frac {2\pi}3\}\) | |
| D. \(\{\pm\frac {\pi}6+k.\frac {2\pi}3\}\) | |
| E. \(\{k.\frac {2\pi}3\}\) |
[ 5-4444 - op net sinds 10.11.04-(E)-19.7.2024 ]
|
What is the set of solutions of cos 2x + cos x = 0 ( k any integer number) |
A. \(\{\frac {\pi}3+k.\frac {2\pi}3\}\) |
|---|---|
| B. \(\{\frac {\pi}3+k.\frac {2\pi}3\,,\;k.2\pi\}\) | |
| C. \(\{\pm\frac {\pi}3+k.\frac {2\pi}3\}\) | |
| D. \(\{\pm\frac {\pi}6+k.\frac {2\pi}3\}\) | |
| E. \(\{k.\frac {2\pi}3\}\) |
