Problem $4(6\mathrm{.}7)$:

For the following data, compute the horizontal distance for a recorded slope distance

AB$,$

$($a$)$ AB $=210\mathrm{.}19$ ft$,$ slope angle $=3\backslash$deg $1428$;

$($b$)$ AB $=125\mathrm{.}657$ m$,$ difference in elevation A to B $=3\mathrm{.}566$ m;