Class 11MathematicsTrigonometrical EquationsRelation between sides and angles, Solutions of triangles
DifficultIn $\Delta ABC$,$a = 2 \ cm$,$b = 3 \ cm$,and $c = 4 \ cm$,then angle $A$ is
- 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$\cos^{-1}\left(-\frac{1}{4}\right)$
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