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Multiple choice

The value of $\dfrac{3+\cos{70^{o}}\cot{10^{o}}}{\cot{70^{o}}+\cot{10^{o}}}$ is

  1. $\cot{50^{o}}$
  2. $\cot{40^{o}}$
  3. $\cot{10^{o}}$
  4. $\cot{70^{o}}$
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