A) \[\sin \,\,\left( \frac{y}{x} \right)=\log \,\,x+\frac{1}{2}\]
B) \[\operatorname{cosec}\,\,\left( \frac{y}{x} \right)=\log \,\,x+2\]
C) \[sec\,\,\left( \frac{2y}{x} \right)=\log \,\,x+2\]
D) \[\cos \,\,\left( \frac{2y}{x} \right)=\log \,\,x+\frac{1}{2}\]
E) None of these
Correct Answer: A
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