trigonometry

Question: If $2y\,\cos \theta =x\sin \,\theta \text{ and }2x\sec \theta -y\,\text{cosec}\,\theta =3,$ then ${{x}^{2}}+4{{y}^{2}}=$

1) $4$

2) $– 4$

3) $\pm 4$

4) None of these

Solution:

Explanation: No Solution

Fundamental trigonometrical ratios and functions Trigonometrical ratio of allied angles

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