[office-formula] minus sign wrong in IMSIN

Hi members,

in the definition of IMSIN there is,
"If N=a+bi, then sin(N)=sin(a)cosh(b)-cos(a)sinh(b)i."

But it should be
If N=a+bi, then sin(N)=sin(a)cosh(b)+cos(a)sinh(b)i.

See Ambramowitz&Stegun 4.3.55.

Kind regards
Regina