cotd

Arguments

x

a real array.

y

a real array with same dimensions as x.

Description

The entries of y are the cotangents of the corresponding entries of x supposed to be given in degree. t=cos(x)./sin(x). For entries equal to n*180 with n integer, the results are infinite, whereas cotg(n*%pi) is large but finite because %pi cannot be represented exactly. For entries equal to n*90 with n integers and odd the results are exactly 0.

Examples

cotd([30 45 60 90])
cotd([-180 -90 0 90 180])

--> cotd([30 45 60 90])
 ans  =
   1.7320508   1.   0.5773503   0.

--> cotd([-180 -90 0 90 180])
 ans  =
   Inf   0.   Inf   0.   Inf

See also

• cotg — cotangent
• coth — hyperbolic cotangent
• tan — tangent
• tand — tangent, argument in degree.