JEE Math Practice Question
If $$y(\theta)=\frac{2 \cos \theta+\cos 2 \theta}{\cos 3 \theta+4 \cos 2 \theta+5 \cos \theta+2}$$, then at $$\theta=\frac{\pi}{2}, y^{\prime \prime}+y^{\prime}+y$$ is equal to :
- A.$$\frac{1}{2}$$
- B.1
- C.$$\frac{3}{2}$$
- D.2
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