inverse sine vs arcsin

inverse sine and arcsin both are nouns.

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

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

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

Other synonyms of inverse sine include arc sine, arcsine.

inverse sine (noun)	arcsin (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