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The sides of a triangleABC satisfy the e...

The sides of a `triangleABC` satisfy the equation `2a^(2) + 4b^(2) + c^(2) =4ab + 2ac`, then-

A

the triangle is isoceles

B

the triangle is obtuse

C

`B= cos^(-1) 7/8`

D

`A = cos^(-1) 1/4`

Text Solution

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The correct Answer is:
A, C, D
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