====== Function SIN, COS, TAN ====== ====Syntax==== * **sin** //radians// → //number// * **cos** //radians// → //number// * **tan** //radians// → //number// ====Arguments and Values==== * //radians// - a //[[CL:Glossary:number]]// given in radians. * //number// - a //[[CL:Glossary:number]]//. ====Description==== **sin**, **cos**, and **tan** return the sine, cosine, and tangent, respectively, of //radians//. ====Examples==== <blockquote> (sin 0) <r>0.0</r> (cos 0.7853982) <r>0.707107</r> (tan #c(0 1)) <r>#C(0.0 0.761594)</r> </blockquote> ====Side Effects==== None. ====Affected By==== None. ====Exceptional Situations==== Should signal an error of type type-error if //radians// is not a //[[CL:Glossary:number]]//. Might signal **[[CL:Types:arithmetic-error]]**. ====See Also==== * **[[CL:Functions:asin|Function ASIN]]** * **[[CL:Functions:acos|Function ACOS]]** * **[[CL:Functions:atan|Function ATAN]]** * {\secref\FloatSubstitutability} ====Notes==== None.