Calculate six trigonometric functions from radian values with custom decimal precision.
请在左侧选择至少一个函数
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Still calculating trigonometric values manually? This tool quickly outputs precise values for six functions: sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (csc). Simply enter an angle in radians (the international standard unit for angles, where 1 radian ≈ 57.3 degrees) to get the result with custom decimal precision.
Does the input unit have to be in radians?
Yes, this tool only supports radian input (e.g., π/4 ≈ 0.785). If you need to convert degrees, please use the formula: Radians = Degrees × π/180.
Why does tan(π/2) return NaN?
When the input value is at an undefined point for the function (such as tan at π/2 ± kπ), it will return NaN (Not a Number) due to mathematical domain limits. This is a characteristic of trigonometric functions, not a tool error.
Please ensure the input value is in radians; decimal places only accept integers from 0 to 10; special undefined points (like π/2) will return NaN; ultra-high precision results may be limited by floating-point arithmetic.
It is recommended to use fractions of π (like π/3) for input to reduce floating-point errors. Typical example: when entering π/4, sin ≈ 0.707, cos ≈ 0.707, and tan = 1. In engineering calculations, pay attention to the impact of domain boundaries on the results.
