1.

If \(\rm y = \sqrt {\sin x + \sqrt {\sin x + \sqrt {\sin x + ... \infty}}}\) then \(\rm \frac {dy}{dx}\) is equal to:

A. \(\rm \frac {\cos x}{2y - 1}\)
B. \(\rm \frac {-\cos x}{2y - 1}\)
C. \(\rm \frac {\sin x}{1 - 2y}\)
D. \(\rm \frac {-\sin x}{1 - 2y}\)
Answer» B. \(\rm \frac {-\cos x}{2y - 1}\)


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