Latest Posts

The Vertices Of A Triangle Are A 1 1 B 4 5 And C 6 13 Find Cosa

Using law of cosines, we have, a<sup>2</sup>=b<sup>2</sup>+c<sup>2</sup>−2bccosAFrom the given points, a<sup>2</sup>=BC<sup>2</sup>=68, b<sup>2</sup>=AC<sup>2</sup>=169, c<sup>2</sup>=AB<sup>2</sup>=25Substituting these values, we have \(\begin{array}{l}cosA=\frac{b^{2}+c^{2}-a^{2}}{2bc}\end{array} \) \(\begin{array}{l}cosA=\frac{169+25-68}{2*13*5}\end{array}... View Article