# Sine meaning

*x*and measured counterclockwise from the point (1, 0) if

*x*is positive or clockwise if

*x*is negative.

- The ratio of the opposite side of a given acute angle in a right triangle to the hypotenuse.
- An equivalent, positive or negative ratio for certain related angles (Ex.: the sine of 57° or 123° is .8387, of 237° or 303° is −.8387) or real numbers representing radians (Ex.: the sine of .9948 radians (57°) is .8387).

*x*and measured counterclockwise from the point (1, 0) if

*x*is positive or clockwise if

*x*is negative.

*x*, equal to the sine of an angle whose measure in radians is equal to

*x.*