Trigonometric functions have different angular units, the general angular unit is "0" and the radian unit is rad. When calculating trigonometric function, first press DRG key to select the corresponding angle unit. When pressed, DEG, RAD and GRAD will be displayed continuously on the display screen of the calculator, and what kind of units will be displayed.

Then press the angle data, and finally press the corresponding trigonometric function button. After that, the data displayed on the display is the calculation result, which is the approximate value calculated by decimal system. You can also choose different accuracy according to actual needs. A typical calculator will display 65,438+00 significant numbers.

For example; sin45

First press DRG (usually, the calculator displays DEG units by default) until DEG is displayed at the top of the display.

Then press 45

Finally, press sin.

At this time, the calculator displays 0.707 10678 1.

It is the result of calculation.