Acos - Texas Instruments TI-89 Developer's Manual

Appendix A: System Routines — Direct Floating Point Operations

acos

Declaration: double acos (double x )
Category(ies): Direct Floating Point Operations
Description: Computes the inverse cosine of x .
x — A double floating-point value.
Inputs:
Outputs: For L1 <= x <= 1 returns inverse cosine of x in radian measure.
For x < L1 or x > 1 returns a floating-point NAN.
Assumptions: None
Side Effects: None
Availability: All versions of the TI-89 / TI-92 Plus.
TI-89 / TI-92 Plus
Differences: None
See Also: asin, atan, cos, sin, tan
Example:
TI-89 / TI-92 Plus Developer Guide Not for Distribution
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Beta Version January 26, 2001