About the function of each button on the calculator:
1, MS: Store the currently displayed value.
2.MR: Read the numerical value in the memory and display it.
3.MC: Clear the existing data.
4.M-: Subtract the currently displayed value from the saved value, and then save the result.
5.M+: Add the currently displayed value with the saved value, and then save the result.
6. Sine, cosine and tangent: trigonometric function. Where sin- 1, cos- 1 and tan- 1 are inverse trigonometric functions.
7. A: Results
Extended data:
/kloc-At the beginning of the 0/7th century, the computing tools in western countries developed greatly. Napier, an English mathematician, invented Napier Arithmetic, and Orchard, an English priest, invented the cylindrical logarithmic ruler. This ruler can not only do addition, subtraction, multiplication, division, multiplication and square root operations, but also calculate trigonometric functions, exponential functions and logarithmic functions.
These computing tools not only promote the development of calculators, but also lay a good foundation for the development of modern calculators and become widely used computing tools in modern society.
1642, Pascal, a great French scientist who was only 19 years old, invented the first mechanical calculator. People can dial in numbers like a telephone dial, and the calculation results will appear in another window, but only add and subtract. 1694, Leibniz improved it to the calculation of multiplication and division in Germany.