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

function.

For example, to calculate 2/3 + 1 4/7 , enter the following keystrokes:

2 a

3 + 1 a

4 a

7 = (Answer = 2 5/21)

To change a fraction to a decimal, or a decimal to a fraction, use the

↔

D function which is located above the

←

key.

For example, to change 4/5 to a decimal, enter:

4 a

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

To raise a number to a power other than 2, use the

function.

For example, to find

, enter 5

3 = (Answer = 125)

Roots: To find the square root of a number, use

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

→

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!

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