Texas Instruments TI-80 Calculator User Manual


 
2-14 Math, Angle, and Test Operations
To display the ANGLE menu, press
2 E
. The ANGLE menu displays angle
indicators and instructions. When you select an item from the menu, the name is
copied to the cursor location.
ANGLE
1:
¡
Degree notation.
2:
r
Radian notation.
3: R
8
Pr(
Returns
r
, given
X
and
Y
.
4: R
8
P
q
(
Returns
q
, given
X
and
Y
.
5: P
8
Rx(
Returns
x
, given
R
and
q
.
6: P
8
Ry(
Returns
y
, given
R
and
q
.
¡
(degree,
ANGLE
, item 1) lets you designate an angle or list of
angles as degrees, regardless of the current angle mode
setting. In
RADIAN
mode,
¡
can also be used to convert
degrees to radians.
value
¡
RADIAN
Mode
r
(radians,
ANGLE
, item 2) lets you designate an angle or list
of angles as radians, regardless of the current angle mode
setting. In
DEGREE
mode,
r
can also be used to convert
radians to degrees.
value
r
DEGREE
Mode
ANGLE Operations
ANGLE
Menu
°
(Degree)
r
(Radians)