《通链参考手册》


Function SIN, COS, TAN

●语法设定:

sin radians => number

cos radians => number

tan radians => number

●参数和值:

radians---a number given in radians.

number---a number.

●详情:

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

●例子:

 (sin 0) =>  0.0
 (cos 0.7853982) =>  0.707107
 (tan #c(0 1)) =>  #C(0.0 0.761594)

●副作用: None.

●受制于: 无。

●例外情况:

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

●更多信息:

asin, acos, atan,

Section 12.1.3.3 (Rule of Float Substitutability)

●说明: 无。


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