Tangent line calculator
Line tangent to y = f(x) at x = a.
Calculator
How to use
Point-slope
y = f(a) + f′(a)(x−a).
Educational use only. For assessments, show reasoning and check boundary cases.
Line tangent to y = f(x) at x = a.
y = f(a) + f′(a)(x−a).
Educational use only. For assessments, show reasoning and check boundary cases.
Model / formula
Tangent line at x = a
Use x (and y if needed): + − * / ^, sin cos tan sqrt abs exp ln log10, pi, e
Result
y = 4.000000 + 4.000000·(x − 2)