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JEE Mains · Maths · STD 11 - Trigonometrical equations

સમીકરણ \(|\cot x|=\cot x+\frac{1}{\sin x}\) ના અંતરાલ \([0,2 \pi]\) માં ઉકેલની સંખ્યા મેળવો.

  1. A \(1\)
  2. B \(2\)
  3. C \(3\)
  4. D \(4\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(1\)

Step-by-step Solution

Detailed explanation

If \(\cot x>0 \Rightarrow \frac{1}{\sin x}=0\) (Not possible) If \(\operatorname{cotx}<0 \Rightarrow 2 \cot x+\frac{1}{\sin x}=0\) \(\Rightarrow 2 \cos x=-1\) \(\Rightarrow x =\frac{2 \pi}{3}\) or \(\frac{4 \pi}{3}( reject )\)
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