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In a DeltaABC, if cotA=(x^(3)+x^(2)+x)^(...

In a `DeltaABC`, if `cotA=(x^(3)+x^(2)+x)^(1//2)`, `cotB=(x+x^(-1)+1)^(1//2)` and `cotC=(x^(-3)+x^(-2)+x^(-1))^(-1//2)` , then the triangle is

A

isosceles

B

Right-angled

C

acute-angled

D

obtuse-angled

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The correct Answer is:
B
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MODERN PUBLICATION-SOLUTION OF TRIANGLES-Level-II
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