Thus, the range of $ f(x) $ is $[-2, 2]$.
![Thus, the range of $ f(x) $ is $[-2, 2]$.](https://soloferat.biz.id/images/thus-the-range-of--fx--is--2-2.jpg)
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- f(1) = -1 + 2 + 1 = 2.
- Evaluate at $ y = -1 $:
- f(-1) = -1 - 2 + 1 = -2.
- \boxed{[-2, 2]}
- Question: A mammalogist observes that the social interaction frequency of a species follows $ \theta $ satisfying $ \tan \theta + \cot \theta = 4 $. Find the sum of all solutions $ \theta \in [0^\circ, 360^\circ] $.
- Solution: Rewrite $ \tan \theta + \cot \theta = 4 $ as:
