Trigonometry Calculator
Calculate sin, cos, tan and their inverses in degrees or radians. Also solves right triangles from two known values.
Frequently Asked Questions
How do I convert degrees to radians?
Multiply degrees by π/180. Key conversions: 0°=0, 30°=π/6, 45°=π/4, 60°=π/3, 90°=π/2, 180°=π, 360°=2π. Most real-world uses of trig (construction, navigation) use degrees.
What does SOH-CAH-TOA mean?
A mnemonic for right triangle trig: Sin = Opposite/Hypotenuse, Cos = Adjacent/Hypotenuse, Tan = Opposite/Adjacent. The ‘opposite’ and ‘adjacent’ sides are relative to the angle you’re working with.
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