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In A B C ,= if (a+b+c)(a-b+c)=3a c , th...

In ` A B C ,=` if `(a+b+c)(a-b+c)=3a c ,` then find `/_Bdot`

A

`angleB=30^(@)`

B

`angleB=60^(@)`

C

`angleB=100^(@)`

D

`angleB=90^(@)`

Text Solution

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The correct Answer is:
B
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