Specifications

Section 10. CRBASIC Programming Instructions
10-19
TABLE 10.6-1. Derived Trigonometric Functions
Function CRBASIC Equivalent
Secant Sec = 1 / Cos(X)
Cosecant Cosec = 1 / Sin(X)
Cotangent Cotan = 1 / Tan(X)
Inverse Secant
Arcsec = Atn(X/Sqr(X*X-1))+Sgn(Sgn(X)-
1)*1.5708
Inverse Cosecant
Arccosec = Atn(X/Sqr(X*X-1))+(Sgn(X)-
1)*1.5708
Inverse Cotangent Arccotan = Atn(X) + 1.5708
Hyperbolic Secant HSec = 2 / (Exp(X) + Exp(-X))
Hyperbolic Cosecant HCosec = 2 / (Exp(X) - Exp(-X))
Hyperbolic Cotangent HCotan = (Exp(X)+Exp(-X))/(Exp(X)-Exp(-X))
Inverse Hyperbolic Sine HArcsin = Log(X + Sqr(X * X + 1))
Inverse Hyperbolic
Cosine
HArccos = Log(X + Sqr(X * X - 1))
Inverse Hyperbolic
Tangent
HArctan = Log((1 + X) / (1 - X)) / 2
Inverse Hyperbolic Secant HArcsec = Log((Sqr(-X * X + 1) + 1) / X)
Inverse Hyperbolic
Cosecant
HArccosec = Log((Sgn(X)*Sqr(X*X+1)+1)/X)
Inverse Hyperbolic
Cotangent
HArccotan = Log((X + 1) / (X - 1)) / 2
10.6.3.2 Intrinsic Functions
ACOS
Returns the arc cosine of a number.
Syntax
x = ACOS (source)
ASIN
The ASIN function returns the arc sin of a number.
Syntax
x = ASIN (source)
ATN
Returns the arctangent of a number.
Syntax
x = ATN (source)
COS
Returns the cosine of an angle specified in radians.
Syntax
x = COS (source)