In the diagram, a ladder PS leaning against a vertical wall PR makes angle x° with the horizontal floor. The ladder slides down to a point QT such that angle QTR = 30° and SNT = y°. Find the relation between x and y.
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A.
(y = frac{1}{2}x + 30) -
B.
(y = frac{1}{2}x + 30) -
C.
(y = x + 30) -
D.
(y = x – 30)