# Free iOS App Today: Solve – A colorful graphing calculator

https://itunes.apple.com/app/id299460923?mt=8&ign-mpt=uo%3D4

Use MathStudio for FREE in your web browser!

http://mathstud.io

Solve is a calculator like no other! Solve solves expressions as you type and features an innovative memory system to store and recall answers. Simply touch the answer to store it and touch the stored answer to use it in an expression.

Solve has four tabs that select four different calculators each with its own color. Multiply numbers, calculate a tip and find a square root all without clearing your results!

Plot graphs with a single touch! Solve plots 2D and 3D functions using the x, y and θ variables. When you use the x, y and θ variables in an equation the answer will say Touch to Plot. Touch this label to graph the equation.

GRAPHING

Plot functions using the x variable. For example, "y=sin(x)" is just entered as "sin(x)".

• cos(x)

• abs(x)

• x^2+2x+6

POLAR GRAPHING

Plot polar equations using the θ variable. For example, "r=2θ" is just entered as "2θ".

• 2θ

• sin(2θ)

3D GRAPHING

Plot 3D functions by using the x and y variables. For example, "z=x+y" is just entered as "x+y".

• cos(x)+sin(y)

• x^2+y^2

PLOT MULTIPLE GRAPHS

Graph multiple functions by separating each equation with a comma.

• sin(x),cos(x)

• x,x^2,x^3

TIME GRAPHING

The T variable is used to create animated or time plots.

• cos(x+T)

• sin(x+T)*x

• cos(x+T)+sin(y+T)