<PRE><B>Question 1053819</B>
The model for this is a 3-4-5 right triangle
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We find cos^(-1) of 3/5, this is the inverse cos of (3/5) to find degrees of x
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The angle opposite the side 3 is 36.86 degrees and angle opposite side 4 is 53.13 degrees
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Note that angle x is 53.13 degrees
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sin(53.13) = 0.7999 approx 0.80 = 4/5
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sin(53.13-(180/2)) = -6.0000 = -3/5
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