HP 10bII+ Financial ]oc, ]oR, ]oC, \5Y, JV]c, J1S:]C, 7DV]oR

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