Digital SAT Math Practice Question #2562
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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).
If $\cos A = 0.8 = 4/5$, then $\sin A = 3/5 = 0.6$ (3-4-5 triangle). Thus $\tan A = \sin A / \cos A = 3/4 = 0.75$....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
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