A) \[\tan \,\,{{x}^{3}}\]
B) \[-\,2\,\,\tan {{\left[ \frac{3x+4}{5x+6} \right]}^{2}}.\frac{1}{{{(5x+6)}^{2}}}\]
C) \[f{{\left[ \frac{3\tan {{x}^{2}}+4}{5\tan {{x}^{2}}+6} \right]}^{2}}\tan {{x}^{2}}\]
D) None of these
Correct Answer: B
Solution :
\[-\,2\tan {{\left[ \frac{3x+4}{5x+6} \right]}^{2}}.\frac{1}{{{(5x+6)}^{2}}}\]
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