Problem

13. \( \frac{\sin (-\theta)}{\cos (-\theta)} \)

Answer

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Answer

\( -\tan (\theta) \)

Steps

Step 1 ：\( \frac{\sin (-\theta)}{\cos (-\theta)} \)

Step 2 ：\( \frac{-\sin (\theta)}{\cos (\theta)} \)

Step 3 ：\( -\tan (\theta) \)

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