Digital SAT Math Practice Question #2556
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Geometry & Trig Rule: Always sketch the triangle or circle and check for standard Pythagorean triples (3-4-5, 5-12-13, 7-24-25, 8-15-17).
Pythagorean triple 8-15-17: $\sin \theta = \sqrt{1 - (8/17)^2} = \sqrt{225/289} = \frac{15}{17}$....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
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