Mathematics - Properties of Triangle Question with Solution | TestHub

In an acute triangle, each sin angle gives its unique acute angle. A fixes a, while B adds an independent angle (A), or b and R fix B via b=2RsinB (C), and a,b,c determine the sides (B). But a,sin A,R obey the same relation a=2Rsin A, leaving B,C variable with fixed A; thus D does not determine the triangle.