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\(\frac{\cot\,(180^{\circ}+\alpha)\cdot\sin\,(90^{\circ}-\alpha)}{\tan\,(-\alpha)\cdot\cos\,(180^{\circ}-\alpha)}=\)
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A. 1 |
|---|
| B. cot ² x |
| C. − cot x |
| D. tan ² x |
| E. − 1 |
[ 4-5244 - op net sinds 23.6.09-(E)-20.10.2026 ]
Translation in E N G L I S H
|
\(\frac{\cot\,(180^{\circ}+\alpha)\cdot\sin\,(90^{\circ}-\alpha)}{\tan\,(-\alpha)\cdot\cos\,(180^{\circ}-\alpha)}=\)
|
A. 1 |
|---|
| B. cot ² x |
| C. − cot x |
| D. tan ² x |
| E. − 1 |
Oplossing - Solution
\(\Large\frac{\cot \, (180^{\circ}+\alpha )\cdot \sin \, (90^{\circ}-\alpha )} {\tan \, (-\alpha )\cdot \cos\, (180^{\circ}-\alpha) }\\
\Large=\frac{\cot \alpha \cdot \cos \alpha }{-\tan \alpha\cdot (-\cos \alpha ) }\\ =\;\cot^2 \alpha\)
