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If a,b,c are real positive numbers and t...

If a,b,c are real positive numbers and `theta =tan^(-1)[(a(a+b+c))/(bc)]^(1/2)+tan^(-1)[(b(a+b+c))/(ca)]^(1/2)+tan^(-1)[(c(a+b+c))/(ab)]^(1/2)`, then `tantheta` equals

A

0

B

1

C

`(a+b+c)/(abc)`

D

2

Text Solution

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The correct Answer is:
A
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