Class 11MathematicsTrigonometrical EquationsRelation between sides and angles, Solutions of triangles
EasyIn a $\triangle ABC$,if $a=13, b=14$ and $c=15$,then $\sin(\frac{A}{2})$ is:
- A$\frac{1}{\sqrt{5}}$
- B$\frac{1}{\sqrt{7}}$
- C$\frac{3}{4}$
- D$\frac{4}{5}$
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Similar Questions
In a $\triangle ABC$,if $r_1 > r_2 > r_3$,then which of the following is true?
With usual notations,if the angles of a triangle are in the ratio $1: 2: 3$,then their corresponding sides are in the ratio.
In triangle $ABC$,$(b + c)\cos A + (c + a)\cos B + (a + b)\cos C = $
Easy
View SolutionIn $\triangle ABC$,what is the value of $\cos A + \cos B + \cos C$?
DifficultAP EAMCET 2024
View SolutionIn $\triangle ABC$,with usual notations,if $\frac{1}{b+c}+\frac{1}{c+a}=\frac{3}{a+b+c}$,then $m \angle C$ is equal to
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