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In a triangle ABC, sinA+sinB+sinC=1+sqrt...

In a triangle ABC, sinA+sinB+sinC=1+`sqrt2` and cosA+cosB+cosC=`sqrt2`. The triangle is

A

equllateral

B

isosceles only

C

right-angled only

D

right-angled isosceles

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The correct Answer is:
D
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