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If a,b,and c are sides of Delta ABC such...

If a,b,and c are sides of `Delta` ABC such that `|{:(c,bcosB+alphabeta,acosA+balpha+cgamma),(a,c cosB+a beta,b cosA+c alpha+agamma),(b,acosB+b beta,c cosA+aalpha+bgamma):}|` =0
(where `alpha ,beta,gamma,in R ^(+) "and" angleA,angleB,angleCne(pi)/(2)), Delta` ABC is

A

an isosceles

B

an equilateral

C

can 't say

D

None of these

Text Solution

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The correct Answer is:
B
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