Is this trigonometric identity provable?
$$\color{red}{}\;\color{navy}{\cot \theta \sec \theta = \dfrac 1 {\sin \theta}}$$
I can't seem to get passed: $\dfrac{1}{\tan\theta \cos\theta}$
trigonometry
Is this trigonometric identity provable?
$$\color{red}{}\;\color{navy}{\cot \theta \sec \theta = \dfrac 1 {\sin \theta}}$$
I can't seem to get passed: $\dfrac{1}{\tan\theta \cos\theta}$
Best Answer
$\cot\theta\sec\theta$
$=\frac{\cos\theta}{\sin\theta}\times\frac{1}{\cos\theta}$
$=\frac{1}{\sin\theta}$