Sine Calculator sin of an angle. Angle (°) sin 0.5 Step-by-step with your numbers: 1. Values used: 2. Angle = 30 ° 3. sin = 0.5 Did we solve your problem today? 👍 Yes 👎 No Thanks for the feedback! Sine function. FAQ sin30°? 0.5. Related calculators Cosine Calculator cos of an angle. Tangent Calculator tan of an angle. Trigonometry Calculator Find sine, cosine and tangent of an angle.