![]() Some of these features include: Unit Converter, Constants Library, Equation solver, Polynomial Solver, Base Conversion, and Decimal to Fraction Conversion. The pallet provides a display area for special features. The calculator is divided into two sections the scientific calculator interface on the left and the calculator pallet on the right. Values in the stack can also be "popped" down into the input field of the calculator by clicking on the down arrows to the left of the line in the stack. The stack displays only 4 items at once, but one can scroll up and down the stack by clicking on the up and down arrow above the stack. The stack is a feature of the calculator that provides a way to view a history of results. The user is given the option to use either input method and both are equally valid however, there are some trigonometric function (as noted below) that are limited to computer keyboard entry only since there is a limited amount of space available for graphical button placements. The online calculator supports data entry through either a graphical button or through the use of traditional computer keyboard keys. Expressions that contain parenthesis, such as "(1+2)*3", are evaluated by noting the precedence order and entering the form as "1 2 + 3 *". For example, to evaluate the expression "1 + 2" in RPN, the user is required to enter "1 2 +" and the expression is evaluated immediately after the operator. RPN Mode RPN, which stands for Reverse Polish notation, is a stack-based notation where operators are designed to follow their operands. Expressions entered in algebraic input mode are done in a manner that closely resembles the natural form of the expression and the order of the operations is determined by operator precedence and parenthesis. ![]() The calculator mode is set by clicking on the "ALG/RPN" symbol in the status bar or by changing the mode inside the menu dialog box.Īlgebraic input mode is commonly referred to as "infix notation" and is widely used by most handheld calculators. The online calculator operates in either algebraic input (default mode) or RPN input. eCalc is offered as both a free online calculator and as a downloadable calculator. Inverse Cotangent Online Hyperbolic Trigonometric FunctionsĬoordinate System Decimal To Fraction Complex Numbers Online Unit Converter Constants Library Online Solver Base ConverterĮCalc is a free and easy to use scientific calculator that supports many advanced features including unit conversion, equation solving, and even complex-number math. There is often an indicator of units written right up with the numerals to let you know what you're getting.Windows Version Mac OSX Version View More Downloads ![]() To change to degrees, look for a MODE key. However, if you get -0.988 then your calculator is set to radian mode. If you get 0.5 using one of these methods, then you know which works. Enter 30 and then SIN and see if you get 0.5. How do you test this: Remember the sine of a 30-degree angle is 0.5. Then, you need to determine whether you enter the angle (check the units) and then sin, cos, tan, etc., or whether you press the sin, cos, etc., button and then enter the number. Trig Functions: When you're working with angles, keep in mind many calculators let you select whether to express the answer in degrees or radians.This is critical for science problems, where you'll live in the land of scientific notation! 10 x: Again, test to see whether you press the 10 x button and then enter your x or whether you enter the x value and then press the button.If the answer was 8, then you took 2 3, but if you got 9, the calculator gave you 3 2. You need to find out whether the first number you enter is the x or the y. Taking the Power: The key may be marked x y or y x.On your calculator, find out whether you need to enter 4 and then press the SQRT key or whether you hit the SQRT key and then enter 4. Square Root: Find the square root of 4.
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