In \[\Delta \,ABC\], \[a=2cm,b=3cm\] and \[c=4cm\] , then angle A is [MNR 1973; MP PET 1984, 2002]

\[{{\cos }^{-1}}\left( \frac{7}{8} \right)\]

\[{{\cos }^{-1}}\left( \frac{1}{24} \right)\]

\[{{\cos }^{-1}}\left( \frac{11}{16} \right)\]

\[{{\cos }^{-1}}\left( -\frac{1}{4} \right)\]

In \[\Delta \,ABC\], \[a=2cm,b=3cm\] and \[c=4cm\] , then angle A is [

1.	In \[\Delta \,ABC\], \[a=2cm,b=3cm\] and \[c=4cm\] , then angle A is [MNR 1973; MP PET 1984, 2002]
A.	\[{{\cos }^{-1}}\left( \frac{1}{24} \right)\]
B.	\[{{\cos }^{-1}}\left( \frac{11}{16} \right)\]
C.	\[{{\cos }^{-1}}\left( \frac{7}{8} \right)\]
D.	\[{{\cos }^{-1}}\left( -\frac{1}{4} \right)\]
Answer» C. \[{{\cos }^{-1}}\left( \frac{7}{8} \right)\]

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In \[\Delta \,ABC\], \[a=2cm,b=3cm\] and \[c=4cm\] , then angle A is [MNR 1973; MP PET 1984, 2002]

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