|
cos x + cos(180° − x) + cos(180° + x) is gelijk aan |
A. cos x + 1 |
|---|---|
| B. cos x − 2 | |
| C. − cos x | |
| D. cos x | |
| E. sin x |
[ 4-4952 - op net sinds 24.7.2026-(E)- ]
|
cos x + cos(180° − x) + cos(180° + x) = |
A. cos x + 1 |
|---|---|
| B. cos x − 2 | |
| C. − cos x | |
| D. cos x | |
| E. sin x |
