MCQ
$8 \cot ^2 A-8 \operatorname{cosec}^2 A$ is equal to
- A$8$
- B$\frac{1}{8}$
- ✓$-8$
- D$-\frac{1}{8}$
✓
Answer
Correct option: C.
$-8$
$\text { (c) } 8 \cot ^2 A-8 \operatorname{cosec}^2 A$
$\Rightarrow-8\left(\operatorname{cosec}^2 A-\cot ^2 A\right)$
$\Rightarrow-8(1)$
$\Rightarrow-8$
$\Rightarrow-8\left(\operatorname{cosec}^2 A-\cot ^2 A\right)$
$\Rightarrow-8(1)$
$\Rightarrow-8$
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