RosettaCodeData/Task/Trigonometric-functions/Logtalk/trigonometric-functions-2.l...

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?- trignomeric_functions::show.
sin(pi/4.0) = 0.7071067811865475
cos(pi/4.0) = 0.7071067811865476
tan(pi/4.0) = 0.9999999999999999
asin(sin(pi/4.0)) = 0.7853981633974482
acos(cos(pi/4.0)) = 0.7853981633974483
atan(tan(pi/4.0)) = 0.7853981633974483
atan2(3,4) = 0.6435011087932844
yes