• sin radians → number
• cos radians → number
• tan radians → number

• radians - a number given in radians.
• number - a number.

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.

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

• Function ASIN
• Function ACOS
• Function ATAN
• {\secref\FloatSubstitutability}

None.