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The sides of A B C satisfy the equation...

The sides of ` A B C` satisfy the equation `2a^2+4b^2+c^2=4a b+2ac` Then a) the triangle is isosceles b) the triangle is obtuse c) `B=cos^(-1)(7/8)` d) `A=cos^(-1)(1/4)`

A

the triangle is isosceles

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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ARIHANT MATHS ENGLISH-PROPERTIES AND SOLUTION OF TRIANGLES -Exercise (More Than One Correct Option Type Questions)
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