Question 1132824
since in a right triangle a^2+b^2=c^2, a or b cannot be equal to c(the hypotenuse).
If either of XY or YZ is the hypotenuse, it would violate the above conclusion. Therefore, XY or YZ cannot be the hypotenuse; XZ is the hypotenuse.
Therefore, Y=90 degrees; X=Z=45 degrees.
So {{{cos(Z)=sqrt(2)/2}}}
{{{tan(Z)=1}}}
{{{csc(Z)=sec(Z)=sqrt(2)}}}