How to use: Calculate trigonometric ratios (sine, cosine, tangent) for angles. Select Formula (Sine, Cosine, or Tangent). Enter Angle in degrees (0-360). Results show the trigonometric ratio value. Common values: sin(30°)=0.5, cos(60°)=0.5, tan(45°)=1, sin(90°)=1, cos(0°)=1. Applications: right triangle solving, wave analysis, navigation, surveying, physics oscillations, engineering structural analysis. SOH-CAH-TOA: Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent. Used in construction for roof pitches, astronomy for celestial positions, and electronics for AC circuit analysis. Essential for geometry and calculus.