Unicamp 2021 · questão 40
Questão 40 Unicamp 2021: Trigonometria
Se \(\theta \in (0, \pi/2)\), a expressão
\[\dfrac{\dfrac{\cos\theta + \operatorname{sen}\theta}{\operatorname{sen}\theta} + \dfrac{\cos\theta - \operatorname{sen}\theta}{\cos\theta}}{\dfrac{\cos\theta + \operatorname{sen}\theta}{\cos\theta} + \dfrac{\cos\theta - \operatorname{sen}\theta}{\operatorname{sen}\theta}}\]
é equivalente a
- A\(\cos^2\theta + \operatorname{sen}^2\theta\).
- B\(\cos 2\theta - \operatorname{sen} 2\theta\).
- C\(\cos 2\theta + \operatorname{sen} 2\theta\).
- D1.