Trigonometric Equation Solver
A trigonometric equation asks which angles make a trig function equal a given number.
Start with an equation that matches a unit-circle value. Full general solutions (plus 2πk) are described in the guide.
Solve a problem
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Example problems
How this solver works
- Evaluate known values.
- If the equation is not yet supported, say so rather than listing an incomplete family of solutions.
Worked examples
sin(30°)=1/2
- Known value
Answer: 1/2
Common mistakes
Missing coterminal angles
Sine is also 1/2 at 150° in [0°, 360°).
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Frequently asked questions
Will you list every solution?
A complete general solution needs a specified interval. Use the unit circle and add 360°k (or 2πk) as your course requires.