The ASIN instruction performs an inverse sine operation on the sine value (IN) and places the result in (OUT). The range of input values is [\ -1,1], and the range of output values is [\ -90,90].

The ACOS instruction performs an inverse cosine operation on the sine value (IN) and places the result in (OUT). The range of input values is [\ -1,1], and the range of output values is [0,180].

The ATAN instruction performs arctangent operation on the sine value (IN) and places the result in (OUT). The range of input values is [\ - ∞,+∞], and the range of output values is [\ -90, 90].

ASIN，ACOS，ATAN instructions are time-consuming, please use them with caution

Input/Output	Data Type	operand	Description
IN	32-bit real number	D/K/FD, local variable (LF)	input
OUT	32-bit real number	D/FD, local variable (LF)	output

command table:

NETWORK 000

LD X000

ASIN K0 D0 // ASIN(0) = 0°

POP

LD X001

ACOS K0 D2 // ACOS(0) = 90°

POP

LD X002

ATAN K0 D4 // ATAN(0) = 0°

POP

图1 ASIN