arcsin vs arc sine

arcsin and arc sine both are nouns.

Word	Noun	Adjective	Verb	Adverb
arcsin	Yes	No	No	No
arc sine	Yes	No	No	No

As nouns, arcsin and arc sine are synonyms defined as:

arcsin and arc sine: the inverse function of the sine; the angle that has a sine equal to a given number

Other synonyms of arcsin include arcsine, inverse sine.

arcsin (noun)	arc sine (noun)
the inverse function of the sine; the angle that has a sine equal to a given number	the inverse function of the sine; the angle that has a sine equal to a given number