Operating the TI-80 1-11
The angle mode controls:
¦How the calculator interprets angle arguments in SIN,
COS, TAN, and polar-to-rectangular conversions.
¦How the calculator returns angle answers to SINê, COSê,
TANê, and rectangular-to-polar conversions.
RADIAN mode interprets angle arguments as radians and
returns angle answers in radians.
DEGREE mode interprets angle arguments as degrees and
returns angle answers in degrees.
aÀbºc displays fraction results as mixed numbers; for
example, the result of 1º3 + 4º3 is displayed as 1À2º3.
bºc displays fraction results as simple fractions; for example,
the result of 1º3 + 4º3 is displayed as 5º3.
AUTOSIMP automatically simplifies fraction results to their
lowest terms before displaying them; for example, the result
of 2º6 + 2º6 is displayed as 2º3.
MANSIMP displays fraction results without automatic
simplification; for example, the result of 2º6 + 2º6 is
displayed as 4º6.
FUNC (function) graphing plots functions where Y is
expressed in terms of X (Chapter 4).
PARAM (parametric) graphing plots relations where X and Y
are each expressed in terms of T (Chapter 5).
CONNECTED draws line segments between the calculated
points of the selected functions.
DOT plots only the calculated points of the selected functions.
SEQUENTIAL graphing evaluates and plots one function
completely before the next function is evaluated and plotted.
SIMUL (simultaneous) graphing evaluates and plots all
selected functions for a single value of X, one at a time. In
Parametric mode, X and Y are selected pairs. They are
evaluated and plotted a T value at a time.
RADIAN
DEGREE
aÀbºc
bºc
AUTOSIMP
MANSIMP
FUNC
PARAM
CONNECTED
DOT
SEQUENTIAL
SIMUL