Texas Instruments TI30XA - Scientific Calculator User manual

Calculator Instructions for TI – 30XA
ON / C Press this key to turn the calculator on or to clear the display
2nd This key is like a shift key and allows you to use the functions above each key in the
pad
Percent: To find 22% of 110, you can either change 22% to a decimal and then
multiply. Or you can use the percent key (located above the digit “2”) as
follows: 110 X 22 2nd 2 =(Answer = 24.2)
Fractions: To do calculations with fractions, use the a
c
b
function.
For example, to calculate 2/3 + 1 4/7 , enter the following keystrokes:
2 a
c
b
3 + 1 a
c
b
4 a
c
b
7 = (Answer = 2 5/21)
To change a fraction to a decimal, or a decimal to a fraction, use the
F
↔
D function which is located above the
←
key.
For example, to change 4/5 to a decimal, enter:
4 a
c
b
5 2nd
←
(Answer = 0.8)
To change a 0.625 to a fraction, enter:
0.625 2nd
←
(Answer = 5/8)
Powers: To square a number use
2
x
To raise a number to a power other than 2, use the
x
y
function.
For example, to find
3
5
, enter 5
x
y
3 = (Answer = 125)
Roots: To find the square root of a number, use
x
Angles: To change an angle in degrees, minutes and seconds to decimal
degrees, use the DMS
→
DD function. For example to change 45

37’ 5”
to decimal degrees, enter: 45.3705 2nd + (Answer = 45.618

)
To change an angle in decimal degrees to degrees, minutes and seconds, use the
DD
→
DMS function. For example, to change 30.45

to degrees, minutes, and
seconds, enter: 30.45 2nd = (Answer = 30

27’)
Trig: To find the trig function of any angle, enter the angle first and then press
the appropriate trig function.
For example to find sin 53

, enter 53 sin (Answer = 0.799)
To find the inverse trig function, enter the ratio first and then press the
inverse trig function. For example, to find sin
1−
(0.45), enter
0.45 2nd sin (Answer = 26.74

)

IMPORTANT INFORMATION REGARDING CALCULATORS
Due to increasing security issues, candidates are not permitted to bring or use their
own calculators at examinations. A calculator will be supplied by Saskatchewan
Apprenticeship for use during examinations.
The model which will be supplied is the
Texas Instruments TI-30XA. It is capable
of the basic functions required by most
trades, as well as the scientific functions
required by some trades. Instructions on
the use of this calculator may be found
on the back of this sheet. These
instructions may also be requested at the
examination facility.
REMEMBER – ABSOLUTELY NO PERSONAL CALCULATORS, CELL PHONES,
PDAS OR OTHER ELECTRONIC DEVISES ARE ALLOWED IN THE
EXAMINATION FACILITY. THERE ARE NO EXCEPTIONS!