If the angles of a triangle \[ABC\]be in A.P., then

1.	If the angles of a triangle \[ABC\]be in A.P., then
A.	\[{{c}^{2}}={{a}^{2}}+{{b}^{2}}-ab\]
B.	\[{{b}^{2}}={{a}^{2}}+{{c}^{2}}-ac\]
C.	\[{{a}^{2}}={{b}^{2}}+{{c}^{2}}-ac\]
D.	\[{{b}^{2}}={{a}^{2}}+{{c}^{2}}\]
Answer» C. \[{{a}^{2}}={{b}^{2}}+{{c}^{2}}-ac\]

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If the angles of a triangle \[ABC\]be in A.P., then

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