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MATRX

       SUBROUTINE  MATRX (T,ANGLE)
 C$    (Rotation About X Axis)
 C$    Return in  T(*,*)  a  4-dimensional  transformation  matrix
 C$    corresponding to a rotation by "ANGLE" degrees about the  X
 C$    axis.   A  positive  angle  represents  a  counterclockwise
 C$    rotation.
 C$    (03-APR-82)