Difference between revisions of "Trigonometry Functions"
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→Arccosine
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More terms will increase accuracy. The larger the angle, the more terms are needed to get acceptable accuracy. As a rough guide use 3 terms for every 10° to get an accuracy of at least 1 decimal digit. | More terms will increase accuracy. The larger the angle, the more terms are needed to get acceptable accuracy. As a rough guide use 3 terms for every 10° to get an accuracy of at least 1 decimal digit. | ||
= Arccosine = | |||
'''Arccos z = (PI / 2) - arcsin(z).''' | '''Arccos z = (PI / 2) - arcsin(z).''' | ||
See above for method of obtaining arcsin. This may be useful when using the Law of Cosines to find the measure of an unknown angle, given three known sides. | See above for method of obtaining arcsin. This may be useful when using the Law of Cosines to find the measure of an unknown angle, given three known sides. | ||
== Arctangent == | == Arctangent == | ||