HP 10bII+ Financial manual 5Y, JVc, J1SC, 7DVoR, Trigonometric and Hyperbolic Functions and Modes

Trigonometric and Hyperbolic Functions and Modes

Selecting Angle Format

The trigonometric angle format determines how numbers are interpreted when using trigonometry functions. The default format for angles on the 10bII+ is degrees. To change to

radians mode, press ]3. When radians mode is active, the RAD annunciator is displayed.

Trigonometric Functions

Table 2-15 Trigonometric functions

KeysDescription

]c	Calculates sine, written as sin.
]R	cos.
	Calculates cosine, written as
]C	tan.
	Calculates tangent, written as
]oc	Calculates inverse sine, also
	written, arcsin, asin, or sin-1.
]oR	Calculates inverse cosine, also
	written, arccos, acos, or cos-1.
]oC	Calculates inverse tangent, also
	written, arctan, atan, or tan-1.

Example

Perform the following trigonometric calculations. If RAD is lit in the display, press ]3.

Table 2-16	Example using various trigonometric calculations
Keys		Display	Description
\5Y		0.0000	Set display to four decimal places.
JV]c		0.2588	Displays sine of 15o.
J1S:]C		1.7321	Displays tangent of 60o.
4		2.7321	Calculates 1 + tangent of 60o.
7DV]oR		69.5127	Displays inverse cosine of 0.35.

Getting Started 35