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1. |
a, b, c are the lengths of three sides of a triangle ABC. If a, b, c are related by the relation $a^{2}+b^{2}+c^{2}$ =ab + bc + ca, then the value of $sin^{2}A + sin^{2}B + sin^{2}C$ is1). $\frac{3}{4}$2). $\frac{3\sqrt{3}}{2}$3). $\frac{3}{2}$4). $\frac{9}{4}$ |
Answer» RIGHT ANSWER is $\FRAC{9}{4}$ | |