When it is necessary to deal with the solution of the applied tasks including trigonometrical functions most often it is required to calculate values of a sine or a cosine of the set corner.
Instruction
1. The first option - classical, with use of paper, a protractor and pencil (or handles). By definition the sine of the angle is equal to a ratio of an opposite leg to a hypotenuse of a rectangular triangle. That is, to calculate value, you should construct a rectangular triangle by means of a protractor, one of corners of which is equal to that which sine interests you. Then to measure length of a hypotenuse and opposite leg and to divide the second into the first with the necessary degree of accuracy.
2. The second option - school. From school all remember the "Bradis's tables" containing thousands of values of trigonometrical functions from different corners. It is possible to look for both the paper edition, and its electronic analog in the PDF format - they are in network. Having found tables, it is possible to find value of a sine of the necessary corner.
3. The third option - optimum. If there is an access to the computer, then it is possible to use the Windows OS standard calculator. It should be switched to the expanded mode. For this purpose in the section "Look" of the menu select the Engineering item. The type of the calculator will change - in it buttons for calculation of trigonometrical functions will appear, in particular. Now enter value of a corner which sine you need to calculate. It is possible to make it as from the keyboard, and clicking the mouse cursor the necessary keys of the calculator. And it is possible just to copy and insert value necessary to you (CTRL + C and CTRL + V). After that choose units of measure in which the answer has to be calculated - for trigonometrical functions it can be radians, degrees or are glad. It becomes the choice of one of three values of the switch located below the entry field of the calculated value. Now, having pressed the button with the inscription ""sin"", receive the answer to the question.
4. The fourth option - the most modern. During an era of the Internet in network there are resources suggesting to solve each problem which is nearly arising in life. Online calculators of trigonometrical functions with the convenient interface, more advanced functionality are not difficult to be found at all. The best of them suggest to calculate not only values of separate function, but also enough difficult expressions from several functions.