Psion netBook, User Manual

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123 Calc
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You can calculate squares, cubes and powers using the buttons in
the Scientific view.
• To calculate the square of a number: enter the number,
tap x
2
, then press = .
•
To calculate the cube of a number: enter the number,
tap x
3
, then press = .
• To calculate a number to a given power: enter the
number you want to raise to a given power. Tap x^y and
enter the power. Press = .
•
To calculate the square root of a number: tap √√√√√ , enter
the number, then press = .
• To calculate the cube root of a number: tap
3
√√√√√ , enter
the number, then press = .
• To find the x root of a number: enter the number of the
root you want to find, e.g. 4 for the fourth root. Tap
x
√√√√√ , and
enter the number you want to find the x root of. Press = .
• To calculate the reciprocal (1/x) of a number: enter the
number then tap x
-1
and tap = .
TTTTTrigonometric functions rigonometric functions rigonometric functions rigonometric functions rigonometric functions
• To calculate the sine, cosine or tangent of a number:
tap sin , cos or tan . Enter the number and press = .
•
To calculate the inverse sine, cosine or tangent of a
number: tap inv once, then tap sin , cos or tan . Enter the
number and press = .
•
To calculate the hyperbolic sine, cosine or tangent of a
number: tap hyp once, then tap sin , cos or tan . Enter the
number and press = .
• To calculate the inverse hyperbolic sine, cosine or
tangent of a number: tap hyp and inv once each to
depress them, then tap sin , cos or tan . Enter the number
and press = .
Angle formats Angle formats
Angle formats Angle formats
Angle formats
The scientific calculator can express angles in degrees, radians
and gradients (360 degrees = 2 π radians = 400 gradients). The
angle units you use will affect the outcome of trigonometric
calculations.
• To change the angle format: select the Formats
command from the Tools menu. Select the format you
require.
You can also change the angle format by tapping on the
abbreviation in the calculation line (e.g. DEG). If the result of a
trigonometric calculation is being displayed when you do this, the
result will automatically be re-evaluated.