Explain, in one sentence, why the expression simplifies to for all real for which…

MATHEMATICS · Subjective · CBSE · Mathematics · Introduction to Trigonometry · Introduction to Trigonometry

Problem

Explain, in one sentence, why the expression

\dfrac{1-\cos^{2}x}{\sin x}

simplifies to

\sin x

for all real

x

for which

\sin x \neq 0