SubArea: Sine, cosine, tangent and cotangentLevel: AProject ID: 9000032109Accepted: 1Clonable: 0Easy: 1Evaluate \(\sin \left ( \frac{\pi }{4}\right )\).\(\frac{\sqrt{2}} {2} \)\(-\frac{\sqrt{2}} {2} \)\(0\)\(-\frac{\sqrt{3}} {3} \)\(\frac{\sqrt{3}} {3} \)\(1\)
