The document shows a triangle with an angle of 36 degrees and an adjacent side of 156 feet, and is calculating the length of the opposite side. It sets up the trigonometric tangent ratio of tan 36 degrees equals the opposite side over the adjacent side. Solving this equation yields a value of 5616 feet for the opposite side. It then adds 11.4 feet to get the total length of 5630.4 feet.
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Lemon Trig diagram
1. tan 36o = opp/adj tan ? = opp/adj
tan 36o = x/156
156 ? tan 36o = x/156 ? 156
156 ? tan 36o = x
5616 = x
5616 + 11.4 = 5630.4 feet
opposite
?
36o adjacent
156 feet
11.4 feet