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In a triangle ABC, a^4 +b^4 +c^4 = 2(a^2...

In a triangle `ABC, a^4 +b^4 +c^4 = 2(a^2 +c^2)b^2` then the angle B is

A

`45^@ or 135^@`

B

`30^@ or 100^@`

C

`50^@ or 100^@`

D

`60^@ or 120^@`

Text Solution

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The correct Answer is:
A
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