LAPACK 3.12.0
LAPACK: Linear Algebra PACKage

Functions  
subroutine  clartg (f, g, c, s, r) 
CLARTG generates a plane rotation with real cosine and complex sine.  
subroutine  dlartg (f, g, c, s, r) 
DLARTG generates a plane rotation with real cosine and real sine.  
subroutine  slartg (f, g, c, s, r) 
SLARTG generates a plane rotation with real cosine and real sine.  
subroutine  zlartg (f, g, c, s, r) 
ZLARTG generates a plane rotation with real cosine and complex sine.  