# Graphing Calculator by Mathlab Pro is the Free App of the Day

Today’s Amazon Free App of the Day is **Graphing Calculator by Mathlab Pro** (4.5/5 stars, all ages, FREE today only). From Amazon:

Graphing calculator with algebra. Essential tool for school and college. Replaces bulky and expensive handheld graphing calculators.

Multiple functions on a graph, polar graphs, graphing of implicit functions, values and slopes, roots, extremes, intersections. Algebra: polynomials, polynomial equation solving, matrices, fractions, derivatives, complex numbers and more. Shows results as you type. Use menu to switch between modes.

**§ SCIENTIFIC CALCULATOR**

• arithmetic expressions +,-,*,/,÷

• square root, cube and higher roots (hold root key)

• exponent, logarithms (ln, log)

• trigonometric functions sin π/2, cos 30°, …

• hyperbolic functions sinh, cosh, tanh, … (hold “e” key to switch)

• inverse functions (hold direct function key)

• complex numbers, all functions support complex arguments

• derivatives sin x’ = cos x, … (hold x^n key)

• scientific notation (enable in menu)

• percent mode

• save/load history

**§ GRAPHING CALCULATOR**

• multiple functions graphing

• implicit functions up to 2nd degree (ellipse 2x^2+3y^2=1, etc.)

• polar graphs (r=cos2θ)

• parametric functions, enter each on new line (x=cos t, y=sin t)

• function roots and critical points on a graph, tap legend to turn on and off (top left corner), use menu to display as a list

• graph intersections (x^2=x+1)

• tracing function values and slopes

• scrollable and resizable graphs

• pinch to zoom

• fullscreen graphs in landscape orientation

• function tables

• save graphs as images

• save tables as csv

**§ FRACTION CALCULATOR**

• simple and complex fractions 1/2 + 1/3 = 5/6

• mixed numbers, use space to enter values 3 1/2

**§ ALGEBRA CALCULATOR**

• linear equations x+1=2 -> x=1

• quadratic equations x^2-1=0 -> x=-1,1

• approximate roots of higher polynomials

• systems of linear equations, write one equation per line, x1+x2=1, x1-x2=2

• polynomial long division

• polynomial expansion, factoring

**§ MATRIX CALCULATOR**

• matrix and vector operations

• dot product (hold *), cross product

• determinant, inverse, norm, transpose, trace

**§ LIBRARY**

• user defined constants and functions (PRO)

• save/load expressions

**Graphing Calculator by Mathlab Pro**: get it today, while it’s Amazon’s Free App of the Day!