|
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 deze vier is correct |
[ 4-4226 - op net sinds 25.2.06-(E)-29.10.2023 ]
|
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 is correct |
