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--- ch2_3_real [2025/01/20 08:56] – created admin
+++ ch2_3_real [2025/01/20 09:16] (current) – admin
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-**//Arithmetic functions//**
+**//Functions of a real variable//**
-Bla bla
+Mathematical functions of single real variable. Will accept any integer of float atom. For the variable out of domain, these functions return ''NIL''.
+Trigonometric functions sine ''SIN'', cosine ''COS'', secant ''SEC'', cosecant ''CSC'', tangent ''TAN'', cotangent ''COT''.
+Versions expecting angle in degrees: ''SIN-D'', ''COS-D'', ''SEC-D'', ''CSC-D'', ''TAN-D'', ''COT-D''.
+Inverse functions returning radians: ''ASIN'', ''ACOS'', ''ASEC'', ''ACSC'', ''ATAN'', ''ACOT''.
+Their modifications returning degrees: ''ASIN-D'', ''ACOS-D'', ''ASEC-D'', ''ACSC-D'', ''ATAN-D'', ''ACOT-D''.
+Square ''SQR'', and square-root ''SQRT''.
+Exponential function ''EXP'', with base the Euler's number. Natural logarithm ''LN''.
+Exponential function ''10POW'', with base 10. Decimal logarithm ''LOG''.
+Absolute value ''ABS''.
-Simple math functions. Remeber the functional notation, the operator always appears at the first position. The artihmetic operations work on integers or floats separatelly. When using mixed integers and floats, the return will be float. When diving integers, it will be taken as be integer division.