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Question : If $\operatorname{cosec} \theta=1 \frac{7}{22}$, then find the value of $\cot ^2 \theta$.

Option 1: $\frac{49}{484}$

Option 2: $\frac{357}{484}$

Option 3: $\frac{225}{484}$

Option 4: $\frac{7}{22}$


Team Careers360 2nd Jan, 2024
Answer (1)
Team Careers360 10th Jan, 2024

Correct Answer: $\frac{357}{484}$


Solution : Given: $\operatorname{cosec} \theta=1 \frac{7}{22}$
⇒ $\operatorname{cosec} \theta=\frac{29}{22}$
We know that: $\operatorname{cosec}^{2}\theta=\cot^{2}\theta+1$
⇒ $\cot^{2}\theta=\frac{841}{484}–1$
⇒ $\cot^{2}\theta=\frac{841–484}{484}$
⇒ $\cot^{2}\theta=\frac{357}{484}$
Hence, the correct answer is $\frac{357}{484}$.

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