iSlideRule Scales - I
"I" Scales
iSTd
The iSTd scale is a combined scale, only available on the slide in position 2, or 3, and that combines four differential trigonometric scales into one scale.  The four scales represented are:
Sd - used for sine trigonometric calculations with values from 0.0° to 90.0°
Td - used for tangent trigonometric calculations with values from 60.0° to 0.0°
ISd - used for inverse sine trigonometric calculations with values from 1.0 down to 0.0.
ITd - used for inverse tangent trigonometric calculations with values from 0.0 to 1.76.
These scales work in conjunction with the D scale and the indexes of that scale to perform more complex differential sine, tangent, arc-sine and arc-tangent calculations.

© 2010-2022 Reid Performance Designs, All Rights Reserved.