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Question : The value of $\frac{1}{\sin \theta}-\frac{\cot ^2 \theta}{1+\operatorname{cosec} \theta}$ is:

Option 1: 2

Option 2: 1

Option 3: –1

Option 4: 0


Team Careers360 13th Jan, 2024
Answer (1)
Team Careers360 14th Jan, 2024

Correct Answer: 1


Solution : Given:
$\frac{1}{\sin \theta}-\frac{\cot ^2 \theta}{1+\operatorname{cosec} \theta}$
= $\operatorname {cosec} \theta - \frac{\operatorname{cosec}^2\theta-1}{1+\operatorname{cosec} \theta}$
= $\operatorname {cosec}\theta-\frac{(\operatorname{cosec}\theta-1)(\operatorname{cosec}\theta+1)}{1+\operatorname{cosec} \theta}$
= $\operatorname{cosec}\theta-\operatorname{cosec}\theta+1$
= $1$
Hence, the correct answer is 1.

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