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JEE Mains · Maths · STD 11 - 3. trignometrical ratios,functions and identities

જો \(f\) બધી વાસ્તવિક સંખ્યા \(x \geq 0\) માટે અયુગ્મ વિધેય હોય તથા  \(f(x)\, =3\, sin\, x + 4\, cos\, x\) હોય, તો \(f(x)\) ની કિમત \(x =  - \frac{{11\pi }}{6}\) આગળ ....... થાય.

  1. A \(\frac{3}{2} + 2\sqrt 3 \)
  2. B \(-\frac{3}{2} + 2\sqrt 3 \)
  3. C \(\frac{3}{2} - 2\sqrt 3 \)
  4. D \(-\frac{3}{2} - 2\sqrt 3 \)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\frac{3}{2} - 2\sqrt 3 \)

Step-by-step Solution

Detailed explanation

Given \(f\) be an odd function \(f(x)\, = \,3\,\sin x + 4\,\cos x\) Now, \(f\left( {\frac{{ - 11\pi }}{6}} \right)\, = \,3\,\sin \left( {\frac{{ - 11\pi }}{6}} \right)\, + 4\,\cos \left( {\frac{{ - 11\pi }}{6}} \right)\,\)…
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