Erlang Tutorial

Erlang cos Method

This method returns the cosine value of the specified value.

cos(X)

X-Specify a value for the cosine function.

The return value is a floating-point value representing the cosine value.

Example

-module(helloworld).　
-import(math,[cos/1]).　
-export([start/0]).　
start()　->　
　　　Cosin = cos(45),　
　　　io:fwrite("~p~n",[Cosin]).

When we run the above program, we will get the following results.

0.5253219888177297