Class 11MathematicsTrigonometrical EquationsRelation between sides and angles, Solutions of triangles
EasyIf $a=2, b=3, c=4$ in a triangle $ABC$,then $\cos C=$
- A$\frac{1}{4}$
- B$\frac{-1}{4}$
- C$\frac{1}{2}$
- D$\frac{-1}{2}$
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