tan

#tan

##Syntax tan ( r : real ) : real

##Description The tan function is used to find the tangent of an angle given in radians. For example, tan (p/4) is 0.5.

##Example This program prints out the tangent of 0, p/6, 2p/6, 3p/6, up to 12p/6 radians.

    for i : 0 .. 12
        const angle := i * Math.PI / 6
        put "Tangent of ", angle, " is ", tan ( angle )
    end for

##Details An argument to tan of p/2, 3*p/2, etc. may result in an overflow (and halt of the program) as the result is technically ¥. (It may not cause an overflow due to rounding, in which case the result will simply be a very large number.)

##See also the sin.html and cos.html functions for calculating sine and cosine.

the tand.html function which finds the tangent of an angle given in degrees. (2p radians are the same as 360 degrees.)

See also predefined unit mathmodule.html.