Class 11MathematicsTrigonometrical EquationsRelation between sides and angles, Solutions of triangles
MediumIn $\triangle ABC$,with usual notations,$2ac \sin \left(\frac{1}{2}(A-B+C)\right)$ is equal to
- A$a^2+b^2-c^2$
- B$c^2+a^2-b^2$
- C$b^2-c^2-a^2$
- D$c^2-a^2-b^2$
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DifficultIIT 1992
View SolutionIn a triangle,if the angles are in the ratio $3: 2: 1$,then the ratio of its sides is
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