Texas Instruments TI-30X Teachers Guide - Page 98

Angle Settings and Conversions 16 Keys 1. I displays the following menu that lets you change the angle mode setting to DEG, RAD, and GRD without affecting the value in the display. DEG Sets degree mode. RAD Sets radian mode. GRD Sets gradient mode. When you turn on the TI30X ÖS, it is always in the DEG mode. 2. = displays a menu that lets you specify the unit of an angle. º r g DMS Specifies degrees. Specifies radians. Specifies gradients. Specifies degrees (º), minutes (´), and seconds (´´). It also lets you convert an angle from decimal degrees to DMS notation. Notes • The examples on the transparency masters assume all default settings. • Angles with a trig function ignore the angle mode setting and display results in the original unit. Otherwise, angles (without a trig function) are converted and displayed according to the angle mode setting. • You enter decimal-degree angles the same as you would any other number. 1 • For decimal/DMS conversions, the calculator interprets all values as degrees, 2 regardless of the angle-unit setting. • DMS angles are entered as º (degrees), ´ (minutes), and ´´ (seconds). © 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide For Teachers 94