SAT Math Practice Question #2553 (Medium) | Test Citadel
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SAT Math Difficulty: Medium

Digital SAT Math Practice Question #2553

Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.

In right triangle $ABC$ with right angle at $C$, $\sin A = \frac{3}{5}$. What is the value of $\cos B$?
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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).

Masterclass Solution & Distractor Trap Analysis

By the complementary angle theorem, in any right triangle, $\sin A = \cos(90^\circ - A) = \cos B$. Thus $\cos B = 3/5$....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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