Calculator

[0], [1], [2] ... [9] - the standard keys;
→ - Remove the last character display;
+ / - Changes the mathematical sign of a number on the screen to the other;
√ - square root calculation;
+ - Addition - Subtraction, x - multiplication ÷ - division;
m + - are stored in memory using the [+] button;
m - is stored in memory using the [-];
mr - display the contents of memory to the screen;
mc - clearing the contents of memory;
c - reset the calculator, without erasing the memory.
sin () - Breast: trigonometric function.
cos () - Cosine: trigonometric function.
tan () - Tangent: trigonometric function.