ABC is a triangle such that \[\sin (2A+B)=\] \[\sin (C-A)=\] \[-\sin (B+2C)=\frac{1}{2}\]. If A, B and C are in A.P., then A, B and C are

\[{{45}^{o}},{{45}^{o}},{{90}^{o}}\]

\[{{30}^{o}},{{60}^{o}},{{90}^{o}}\]

\[{{45}^{o}},{{60}^{o}},{{75}^{o}}\]

\[{{60}^{o}},{{60}^{o}},{{60}^{o}}\]

ABC is a triangle such that \[\sin (2A+B)=\] \[\sin (C-A)=\] \[-\sin (

1.	ABC is a triangle such that \[\sin (2A+B)=\] \[\sin (C-A)=\] \[-\sin (B+2C)=\frac{1}{2}\]. If A, B and C are in A.P., then A, B and C are
A.	\[{{30}^{o}},{{60}^{o}},{{90}^{o}}\]
B.	\[{{45}^{o}},{{60}^{o}},{{75}^{o}}\]
C.	\[{{45}^{o}},{{45}^{o}},{{90}^{o}}\]
D.	\[{{60}^{o}},{{60}^{o}},{{60}^{o}}\]
Answer» C. \[{{45}^{o}},{{45}^{o}},{{90}^{o}}\]

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ABC is a triangle such that \[\sin (2A+B)=\] \[\sin (C-A)=\] \[-\sin (B+2C)=\frac{1}{2}\]. If A, B and C are in A.P., then A, B and C are

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