When is the (co)sine of a rational angle equal to a rational number?

MLA

Jahnel, Jörg. When Is the (Co)Sine of a Rational Angle Equal to a Rational Number? 2010. EBSCOhost, widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsarx&AN=edsarx.1006.2938&authtype=sso&custid=ns315887.

APA

Jahnel, J. (2010). When is the (co)sine of a rational angle equal to a rational number?

Chicago

Jahnel, Jörg. 2010. “When Is the (Co)Sine of a Rational Angle Equal to a Rational Number?” http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsarx&AN=edsarx.1006.2938&authtype=sso&custid=ns315887.