x^2 at x=3
What this calculator does
Evaluate the exact derivative and decimal slope at a chosen input value. This focused tool is designed for one clear calculus task, so you see only the controls and explanations that matter.
How to use this calculator
Enter the expression, select the variable and any required controls, then press Calculate. Review the exact result before opening the steps or graph.
When this tool is useful
Use it to check homework, explore a function, confirm hand calculations, or understand how a calculus rule changes an expression.
How to read the result
Start with the exact symbolic answer. Then review verification, reliable steps, and the graph where they are available. An inconclusive verification label is not presented as a guarantee.
Supported functions and syntax
Use +, −, *, /, powers, parentheses, sin, cos, tan, asin, acos, atan, sinh, cosh, tanh, ln, log, exp, sqrt, abs, pi, and e.
Common mistakes
From a first derivative to directional change and tangent lines, choose the tool that matches the problem you are actually solving.