Psion Teklogix netBook manual Powers, roots & reciprocals, Trigonometric functions, Angle formats

Powers, roots & reciprocals

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 x2, then press =.

∙To calculate the cube of a number: enter the number, tap x3, 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-1and tap =.

Calc 123

Trigonometric 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

The scientific calculator can express angles in degrees, radians and gradients (360 degrees = 2π 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.