|
Welke gelijkheid is juist ? (α geen veelvoud van 90° ) |
A. sin (90° + α) = sin (270° − α) |
|---|---|
| B. cos (90° + α) = cos (270° − α) | |
| C. tan (90° + α) = tan (270° − α) | |
| D. cot (90° + α) = cot (270° − α) | |
| E. geen van de vorige is juist |
[ 4-4794 - op net sinds 16.2.07-(E)-16.12.2021 ]
|
Which equation is correct ? ( α not a multiple of 90° ) |
A. sin (90° + α) = sin (270° − α) |
|---|---|
| B. cos (90° + α) = cos (270° − α) | |
| C. tan (90° + α) = tan (270° − α) | |
| D. cot (90° + α) = cot (270° − α) | |
| E. none of the above |
