Functions Calculator

Evaluate, combine, compose, graph, and analyze functions with step-by-step work, tables, intercepts, symmetry tests, and tangent lines.

Choose a function tool

Use explicit multiplication like 2*x, or type implicit forms like 2x. Supported functions: sin, cos, tan, sqrt, abs, ln, log, exp.
11 operations
Example: x^2 - 4*x + 3
Used for operations and composition
Use pi/2, 1/3, or decimals
Difference quotient step
Average rate start
Average rate end
First x in table
Last x in table
Row spacing
Analysis window
Analysis window
f(x)=ax+b
f(x)=ax+b
Controls displayed explanations

Graph preview

The graph uses numeric sampling. Breaks appear where the function is undefined.
f(x)   g(x) / tangent
This calculator uses numeric methods for roots, derivatives, domain scans, and graphs. Exact symbolic simplification is shown only where the selected tool supports it.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.