ExamBro
ExamBro
enEnglishguગુજરાતી
JEE Mains · Maths · STD 11 - Trigonometrical equations

અંતરાલ \([0, 5\pi ]\) માં સમીકરણ \(sin\, 2x - 2\,cos\,x+ 4\,sin\, x\, = 4\) ના ઉકેલો ની સંખ્યા મેળવો.

  1. A \(3\)
  2. B \(5\)
  3. C \(4\)
  4. D \(6\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(3\)

Step-by-step Solution

Detailed explanation

\(\sin \,2x\, - 2\,\cos \,x\, + \,4\,\sin \,x\, = 4\) \( \Rightarrow \,2\,\sin \,x.\,\cos \,x - 2\,\cos \,x\, + \,4\,\sin \,x - 4 = 0\) \( \Rightarrow \,(\sin \,x - 1)(\cos \,x - 2)\, = \,0\) \(\because \,\cos \,x\, - \,2\, \ne \,0\,,\) \(\therefore \,\sin \,x\, = 1\)…
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app