Campbell Scientific CR200/CR200X-series Dataloggers - Manual (Page 113)

Section 10. CRBASIC Programming Instructions
OR
Used to perform a logical disjunction on two expressions.
Syntax
result = expr1 OR expr2
XOR
Performs a logical exclusion on two expressions.
Syntax
result = expr1 XOR expr2
10.6.3 Trigonometric Functions
10.6.3.1 Derived Functions
TABLE. Derived Trigonometric Functions (p. 101) is a list of trigonometric
functions that can be derived from functions intrinsic to CRBASIC.
Table 13. 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)
101