Getting Started 35Trigonometric and Hyperbolic Functions and ModesSelecting Angle FormatThe trigonometric angle format determines how numbers are interpreted when usingtrigonometry functions. The default format for angles on the 10bII+ is degrees. To change toradians mode, press ]3. When radians mode is active, the RAD annunciator isdisplayed.Trigonometric FunctionsExamplePerform the following trigonometric calculations. If RAD is lit in the display, press ]3.Table 2-15 Trigonometric functionsKeys Description]c Calculates sine, written as sin.]R Calculates cosine, written ascos.]C Calculates tangent, written astan.]oc Calculates inverse sine, alsowritten, arcsin, asin, or sin -1.]oR Calculates inverse cosine, alsowritten, arccos, acos, or cos -1.]oC Calculates inverse tangent, alsowritten, arctan, atan, or tan -1.Table 2-16 Example using various trigonometric calculationsKeys Display Description\5Y 0.0000 Set display to four decimal places.JV]c 0.2588 Displays sine of 15 o.J1S:]C 1.7321 Displays tangent of 60 o.4 2.7321 Calculates 1 + tangent of 60 o.7DV]oR 69.5127 Displays inverse cosine of 0.35.
