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The set of values of a for which x^2+ax+...

The set of values of `a` for which `x^2+ax+sin^(-1)(x^2-4x+5)+cos^(-1)(x^2-4x+5)=0` has at least one real root is given by

A

`(-oo, - sqrt(2) pi] uu[sqrt(2 pi), oo)`

B

`(-oo, -sqrt(2 pi))uu(sqrt(2 pi), oo)`

C

R

D

None of these

Text Solution

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The correct Answer is:
A
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