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If cos^(2)A+cos^(2)B+cos^(2)C=1, then tr...

If `cos^(2)A+cos^(2)B+cos^(2)C=1`, then `triangle ABC` is

A

isosceles

B

right-angled

C

equilateral

D

obtuse-angled

Text Solution

Verified by Experts

The correct Answer is:
B
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