# Function SIN, COS, TAN

### Description

sin, cos, and tan return the sine, cosine, and tangent, respectively, of radians.

```
(sin 0)

→
0.0

(cos 0.7853982)

→
0.707107

(tan #c(0 1))

→
#C(0.0 0.761594)

```

None.

None.

### Exceptional Situations

Should signal an error of type type-error if radians is not a number. Might signal arithmetic-error.