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If bara,barb,barc " are three vectors su...

If `bara,barb,barc " are three vectors such the " bara=barb+barc,(barb,barc)=pi/2 and absbara=a, absbarb=b, absbarc=c` then

A

`a^(2) =b^(2)+c^(2)`

B

`b^(2) =c^(2)+a^(2)`

C

`c^(2) =a^(2)+b^(2)`

D

`2a^(2) -b^(2) = c^(2)`

Text Solution

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The correct Answer is:
A
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