JEE Math Practice Question
$$\mathop {\lim }\limits_{x \to \pi /4} {{{{\cot }^3}x - \tan x} \over {\cos \left( {x + {\pi \over 4}} \right)}}$$ is :
- A.$$8\sqrt 2 $$
- B.4
- C.$$4\sqrt 2 $$
- D.8
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