Question

If $ S=sin^{2}p-1/2\,sin\left(2p\right)\,\left(sin^{2}p\right) $ $ +1/3\,sin\left(3p\right)\,\left(sin^{3}p\right)-\frac{1}{4}\,sin\left(4p\right) $ $ \left(sin^{4}p\right)+\ldots\,\infty $ then $ tanS= $

• A. $ \frac{cos^{2}\,p}{1+cos\,p \cdot sin\,p} $
• B. $ \frac{sin^{2}\,p}{1+cos\,p \cdot sin\,p} $
• C. $ \frac{sin^{2}\,p}{1+cos\,2p } $
• D. $ 0 $

Answer 1

Answer: (B)

Correct answer is (b) $ \frac{sin^{2}\,p}{1+cos\,p \cdot sin\,p} $