If a, b and c are the sides of a triangle such that \[{{a}^{4}}+{{b}^{4}}+{{c}^{4}}=2{{c}^{2}}({{a}^{2}}+{{b}^{2}})\] then the angles opposite to the side C is [J & K 2005]

\[30{}^\circ \] or \[100{}^\circ \]

\[45{}^\circ \] or \[135{}^\circ \]

\[50{}^\circ \] or \[100{}^\circ \]

\[60{}^\circ \] or \[120{}^\circ \]

If a, b and c are the sides of a triangle such that \[{{a}^{4}}+{{b}^{

1.	If a, b and c are the sides of a triangle such that \[{{a}^{4}}+{{b}^{4}}+{{c}^{4}}=2{{c}^{2}}({{a}^{2}}+{{b}^{2}})\] then the angles opposite to the side C is [J & K 2005]
A.	\[45{}^\circ \] or \[135{}^\circ \]
B.	\[30{}^\circ \] or \[100{}^\circ \]
C.	\[50{}^\circ \] or \[100{}^\circ \]
D.	\[60{}^\circ \] or \[120{}^\circ \]
Answer» B. \[30{}^\circ \] or \[100{}^\circ \]

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If a, b and c are the sides of a triangle such that \[{{a}^{4}}+{{b}^{4}}+{{c}^{4}}=2{{c}^{2}}({{a}^{2}}+{{b}^{2}})\] then the angles opposite to the side C is [J & K 2005]

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