Welke gelijkheid is fout ? |
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A. .sin 60°= sin 30° |
B. tan 20° . cot 20° = 1 |
C. sin 45° + cos 45° = |
D. tan 30° = cot 60° |
E. cos 20° = − cos 160° |
[ 4-1402 - op net sinds 7.1.16-(E)-3.11.2024 ]
Which equality is false ? |
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A. .sin 60°= sin 30° |
B. tan 20° . cot 20° = 1 |
C. sin 45° + cos 45° = |
D. tan 30° = cot 60° |
E. cos 20° = − cos 160° |