|
Welke gelijkheid is juist voor om 't even welke hoek x ?
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A. sinx + cosx = 1 |
|---|---|
| B. ( sin² x + cos² x )2 = 1 | |
| C. ( sin x + cos x )2 = 1 | |
| D. ( sinx.cosx )2 = 1 | |
| E. sin2x − cos2 x = 1 |
[ 4-3526 - op net sinds 6.12.02-(E)-29.10.2023 ]
| Which equation is true for all angles x ? |
|---|
| A. sinx + cosx = 1 |
| B. ( sin2x + cos2x )2 = 1 |
| C. ( sin x + cos x )2 = 1 |
| D. ( sinx.cosx )2 = 1 |
| E. sin2x − cos2 x = 1 |
