For example, for example, find the acute angle of cosine =0.537.
The method is as follows:
1, enter 0.537 for the numeric keys of the calculator, as shown in the following figure:
2. Click the "Inv" key, as shown in the following figure:
3. Click the "cos" key, as shown in the following figure:
4. Get this acute angle, as shown below:
Extended data:
How to use the calculator function, first look at the instructions of the calculator, what number to input first, what calculation key to press, and then what calculation key to press, and you can get the answer.
Calculator is generally composed of arithmetic unit, controller, memory, keyboard, display, power supply and some optional peripheral devices and electronic accessories, and is composed of manual or mechanical equipment.
The arithmetic unit and controller of low-level calculator realize simple serial operation through digital logic circuit, and its random access memory has only one or two units for accumulation storage.
High-end calculator consists of microprocessor and read-only memory, and has many random storage units to store input programs and data. The keyboard is the input part of the calculator, generally using contact or induction. In order to reduce the size of the calculator, a key often has multiple functions.
The display is the output part of the calculator, including LED display or LCD display. In addition to displaying the calculation results, there are often overflow instructions, error instructions and so on.
The calculator is powered by an AC converter or a battery, which can be charged by an AC converter or a solar converter.
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