engineering computer

Function description: [AC] (Esc): Clear the entire field, reset the current calculation formula and records to zero. [⌫] (Backspace): Backspace key, delete the last entered number or arithmetic symbol. [DEG/RAD]: Switching between angle (Degree) or radian (Radian) mode will affect the calculation results of sin, cos, and tan. [=] (Enter): Performs calculations and displays the results, while moving the calculation process to the upper history. Trigonometric functions: After clicking sin/cos/tan, sin(, please enter the value and fill it in manually) will be generated. Factorial (n!): Click to display fact(, for example, entering fact(5) equals 120. Power (x^y): Use the ^ symbol, for example 2^3 represents 2 raised to the third power. Reciprocal (1/x): Automatically generate ^(-1), just follow the value. Things to note: This code uses parseFloat(result.toPrecision(12)) to handle common JavaScript floating point error problems (such as 0.1 0.2). If the expression syntax is incorrect, the word 'Error' will be displayed on the screen.