Tangent Calculator tan of an angle. Angle (°) tan 1 Step-by-step with your numbers: 1. Values used: 2. Angle = 45 ° 3. tan = 1 Did we solve your problem today? 👍 Yes 👎 No Thanks for the feedback! Tangent function. FAQ tan45°? 1. Related calculators Sine Calculator sin of an angle. Cosine Calculator cos of an angle. Trigonometry Calculator Find sine, cosine and tangent of an angle.