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Primitive Data Types Tutorial

Trigonometric Functions

Usual trigonometric functions are available: sin(x), cos(x), tan(x), asin(x), acos(x) and atan(x). The type of each of these functions is ( Float -> Float ). Angles are measured in radians. Additionally, atan2(x,y) maps a pair of float values to appropriate angle. For non-zero values, atan2(x,y) = atan(x/y).

Source code:

{#
sin(3.14/2.0) * cos(3.14/2.0),
tan(3.14/2.0),
asin(0.5) + acos(0.5),
atan(0.5),
atan2(1.0,2.0),
atan2(1.0,0.0)
#}

Result:

{# 0.000796, 1255.660278, 1.570796, 0.463648, 0.463648, 1.570796 #}

 

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The most of examples evaluates with both command line and Web server Wafl interpreters. If any example is based on specific features of an interpreter, it is explicitly annotated.