Trigonometric Functions Calculator f(x)
Evaluate primary trigonometric functions (sine, cosine, tangent) at any degree angle.
Evaluating f(x)
Trigonometric functions map an angle (x) to a ratio of sides of a right triangle. This tool lets you quickly find the exact or approximate decimal value of f(x) = sin(x), cos(x), or tan(x).
Frequently Asked Questions
Why is tan(90) undefined?
Tangent is defined as sine divided by cosine. At 90 degrees, cosine is exactly 0. Since division by zero is mathematically undefined, the tangent graph has a vertical asymptote at 90 degrees.
Disclaimer: This calculator is for educational and learning purposes only. While we strive for accuracy, calculations are provided "as-is" without warranty. The accuracy of results depends on the accuracy of input data provided. Always verify important calculations independently. For critical applications or when accuracy is essential, consult with appropriate professionals or use verified reference sources. Educational calculators may contain rounding or approximations.