- B 35 C A Note: Figure not drawn to scale. In the right triangle shown, what is the value of sinA?
Correct answer: B (parsed from the explanation — this source omits an answer key for this item)
Explanation
Choice B is correct. The sine of an acute angle in a right triangle is the ratio of the length of the side opposite that angle to the length of the hypotenuse. The hypotenuse of a right triangle is the side opposite the right angle. In right triangle ABC, side BC is the side opposite angle A and side AB is the 35 hypotenuse. It’s given that the length of side BC is units and the length of 171 sin 35 side AB is units. Therefore, the value of A is 171. Choice A is incorrect and may result from conceptual or calculation errors. Choice C is incorrect. This is the ratio of the length of the hypotenuse to the length of the side opposite angle A rather than the ratio of the length of the side opposite angle A to the length of the hypotenuse. Choice D is incorrect. This is sin the length of the hypotenuse rather than A. 43 SAT PRACTICE TEST #8 ANSWER EXPLANATIONS SAT ANSWER EXPLANATIONS n MATH: MODULE 2
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