Sharp EL-9900 operation manual Calculations Using Math Menu Items, Degrees, Radians

Chapter 3: Basic Calculations — Basic Keyboard

4. Calculations Using MATH Menu Items

The MATH menu contains functions used for more elaborate math concepts, such as trigonometry, logarithms, probability, and math unit/format conversions. The MATH menu items may be incorporated into your expressions.

Note: The default angle measurement unit while using the calculator’s Basic Keyboard is degrees. If you wish to work in radians, then the configuration must be changed in the SET UP menu. For more information, see page 25.

A Note about	The degree and radian systems are two of the basic methods of
Degrees and	measuring angles. There are 360 degrees in a circle, and “2-pi”
Radians	radians. 1 degree is equal to pi/180 radians. “Then, what’s this
	pi?”, you may ask. Pi, or to use its symbol “π”, is the ratio of the
	circumference of a circle to its diameter. The value of π is the
	same for any circle “3.14...”, and it is believed to have an infinite
	number of digits beyond the decimal point.
	A CALC
	The CALC sub-menu contains items to be used in calculations
	containing trigonometric and logarithmic functions.
Note:	The following examples show keystrokes with keyboard shortcuts.
	It is also possible to select a sub-menu item using the cursor
	keys.

1sin Enters a sine function to be used in a trigonometric calculation.

Example

•Calculate sine 90°.

MA19 0 E

2cos Enters a cosine function to be used in a trigonometric calcula- tion.

Example

•Calculate cosine 60°.

MA26 0 E

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