Which point on the number line represents -3/4

Use the graph of the sine function y=2sinθ shown below

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6