List of top Mathematics Questions on Triangles asked in AP EAPCET

In a triangle \(ABC\), if \[ a=2,\qquad b=4,\qquad \cos C=-\frac{5}{16}, \] then the circumradius \(R\) is

In \(\triangle ABC\), if \[ c=9,\qquad s=10,\qquad \Delta=10\sqrt2, \] then \[ \sin\frac{C}{2} = \]

The triangle with vertices at \[ (-2,2),\ (2,-2)\ \text{and}\ (1,1) \] is