JEE Math Practice Question
A possible value of $$\tan \left( {{1 \over 4}{{\sin }^{ - 1}}{{\sqrt {63} } \over 8}} \right)$$ is :
- A.$$\sqrt 7 - 1$$
- B.$${1 \over {\sqrt 7 }}$$
- C.$$2\sqrt 2 - 1$$
- D.$${1 \over {2\sqrt 2 }}$$
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