The value of sin θ + sin 3 θ cos θ + cos 3 θ is

1. $\cos 2\theta$
2. $\cot 2\theta$
3. $\tan 2\theta$
4. $\mathrm{cosec}\theta +\sin \theta$

Solution

Asked in: AP EAMCET 2022 (04 Jul Shift 1)

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