Cosh function, Crv_exists function, Cosh( a ) – Delta RMC151 User Manual
Page 365: Crv_exists( id)
5 Programming
COS(a)
Returns the cosine of a.
Parameters
a (REAL)
The input value in radians.
Return Value
Returns a REAL.
Remarks
Notice a is in radians. To convert a value from degrees to radians, multiply the degrees
value by
π
/180. The RMC has an M_PI constant for
π
.
Due to the 32-bit floating point limitations, COS(M_PI / 2) returns -43.71139E-9 instead
of zero. For complex calculations, you may need to check for an exact zero and code the
return value as needed.
Examples
COS(M_PI) returns -1.0
COS(45 * M_PI / 180) returns 0.70710677
5.14.2.11. COSH Function
COSH(a)
Returns the hyperbolic cosine of a.
Parameters
a (REAL)
The input value.
Return Value
Returns a REAL.
5.14.2.12. CRV_EXISTS Function
CRV_EXISTS (id)
Returns TRUE if the curve with the specified id exists, otherwise returns FALSE.
Parameters
id (DINT)
The curve ID.
Return Value
Returns a BOOL.
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