The sides of a triangle are given to be $ x^2 +x +1 ,$ $2x+1,$ $x^2-1$Then find the largest of the three angle of the triangles .
I tried by applying hero's
formula and then equating to the formula
$ 0.5 bc \sin\theta $. But using these methods , then i have to try 3 times for each angle . And still i cant get the value of x. I think i can do it throuh by randomly assigning a value to x and then get the value of the angle opposite to the longest side.
Thanks in advance.