A) \[x\in (2,5)\]
B) \[x\in (-\infty ,\infty )\]
C) Data insufficient
D) none of these
Correct Answer: D
Solution :
As \[\Sigma \tan A=\tan A.\tan B.\tan C\]also for obtuse angled triangle \[\tan A.\tan B.\tan C<0\] \[\therefore \]\[{{x}^{2}}-4x+6<0\]\[\Rightarrow \]\[{{(x-2)}^{2}}+2<0\]which is not possible for any value of x.You need to login to perform this action.
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