【實用工具app】Graphing Calculator free|最夯免費app-綠色工廠好玩App

• Graph functions, parametric equations and point sets using Cartesian or polar coordinate systems.

• Curve fitting and linear regression lines: When plotting a point set, the graphing calculator can also find and graph the polynomial of the least degree containing all the points. It can also find and graph the linear regression line. Or, you can just connect the points with straight lines to form a polygon, for example.

• Generate table of values for functions and parametric equations.

• Calculate definite integral, area under (or enclosed by) the graphs of functions (or parametric curves) and arc length in both Cartesian and polar cases.

• Calculate expressions containing complex numbers, such as, (2-3i)^i+5∠(π/4). You can use i or j for the imaginary unit. The result is given in standard, polar and other forms.

• Choice of scientific, engineering and fixed point notations.

• Choice of background color for the calculator.

• The calculator also provides a very useful and intuitive units converter for converting units of mass, length, time and many more quantities.

When viewing the Graphs:

• Touch Polar on the upper right corner of the graphing area to draw the graphs in polar coordinate system.

• Drag the graphs. To center the graph on the screen, touch the coordinate indicator on the top left corner of the graphing area.

• Touch ++ or -- on the lower right corner of the graphing area to zoom in or out.

• Touch the lower left corner of the graphing area (where the caption is) to reset zoom.

You can use the following in your expressions

• Basic algebraic operations

• Power functions

• Trigonometric functions and their inverses (RAD, DEG)

• Hyperbolic functions and their inverses

• Exponential and logarithmic functions

• Factorial, the Gamma function Γ and Psi function Ψ.

• Absolute value and Step functions.

Syntax( by examples)

The graphing calculator, for convenience, automatically appends a default interval to function and parametric expressions and graphs or does calculations over the interval. You can change the endpoints of the interval, of course.

• Function: f(x) = xsin(2x) intvl=(-∞, ∞). (You don't have to type in the interval 'intvl=(-∞, ∞)'; the graphing calculator appends it when you press the graph button. You can change the end-points as desired.)

• Parametric: p(t) = 3cos(3t), 3sin(2t) intvl=(0, 2π). (You can use x for t.) Note: enter x(t) and y(t) separated by a comma (no enclosing parentheses around p(t) ).

• Point set: 1,2; 2,3; 4,5; Note: enter the point (x,y) as x,y;