Question 1007305
Drawing a picture or two on paper will help.


Suzie stands at D.  Bottom of right wall is R, and bottom of left wall is L.  Right angle of the triangle is at L.  DR is the hypotenuse of 12 meters.


How far is Suzie from the left wall?  What is the length DL?
Interior angle of triangle at D is given as 39 degrees.
{{{DR*cos(39)=DL}}}.
Same as  {{{DL=12*cos(39)}}}.


Next part, same points L and D, but point at top of the left wall, nearest corner there at the top, U.  This makes triangle DLU.  Understand from described, LU=4.7 meters.
Review...
{{{system(LU=4.7,DL=DR*cos(39))}}}
Putting in values now,
{{{system(LU=4.7,DL=12*cos(39))}}}-----and you will not need hypotenuse UD.


Use tangent function.  Question asks for angle at point D, but now for this "next part" triangle.  {{{Alpha}}} for this angle of elevation,


{{{tan(alpha)=LU/DL}}}
{{{tan(alpha)=4.7/(12*cos(39))}}}


You want  {{{tan^-1(4.7/(12*cos(39)))}}}


--
continuing,
{{{tan^-1(4.7/(12*0.77714))}}}
{{{tan^-1(0.50398)=highlight(27*degrees)}}}, to the nearest whole degree.


(Rechecked on paper now three times - certain!)