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Trigonometric functions take numeric arguments and produce numeric results.

- Function:
**ARCOS***(*`number`) - Function:
**ACOS***(*`number`) Takes the arccosine, in radians, of

`number`. Results in system-missing if`number`is not between -1 and 1 inclusive. This function is a PSPP extension.

- Function:
**ARSIN***(*`number`) - Function:
**ASIN***(*`number`) Takes the arcsine, in radians, of

`number`. Results in system-missing if`number`is not between -1 and 1 inclusive.

- Function:
**ARTAN***(*`number`) - Function:
**ATAN***(*`number`) Takes the arctangent, in radians, of

`number`.

- Function:
**COS***(*`angle`) Takes the cosine of

`angle`which should be in radians.

- Function:
**SIN***(*`angle`) Takes the sine of

`angle`which should be in radians.

- Function:
**TAN***(*`angle`) Takes the tangent of

`angle`which should be in radians. Results in system-missing at values of`angle`that are too close to odd multiples of*\pi/2*. Portability: none.