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Complete the Identity cos(tan1v)=?\cos \left( \tan ^ { - 1 } v \right) = ?

Question 368

Multiple Choice

Complete the identity.
- cos(tan1v) =?\cos \left( \tan ^ { - 1 } v \right) = ?


A) vv2+1\mathrm { v } \sqrt { \mathrm { v } ^ { 2 } + 1 }

B) v21v21\frac { \sqrt { v ^ { 2 } - 1 } } { v ^ { 2 } - 1 }

C) v2+1v2+1\frac { \sqrt { v ^ { 2 } + 1 } } { v ^ { 2 } + 1 }

D) vv2+1v2+1\frac { v \sqrt { v ^ { 2 } + 1 } } { v ^ { 2 } + 1 }

Correct Answer:

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