{"id":"cb_practice_pdf:t5-math-m1-q19","source_id":"cb_practice_pdf","source_item_id":"t5-math-m1-q19","external_id":null,"ibn":null,"question_id":null,"program":"SAT","module":"math","domain_code":null,"domain":null,"skill_code":null,"skill":null,"difficulty":null,"score_band":null,"answer_type":"mcq","answer_source":"rationale","layout_warning":null,"form_id":"cb_practice_pdf:test-5","module_number":1,"position":19,"stem":"tan What is the value of (- 92π)/3?","stimulus":"","stimulus_html":null,"stem_html":"<p>tan What is the value of (- 92π)/3?</p>","rationale_html":"<p>Choice A is correct. A trigonometric ratio can be found using the unit circle, that is, a circle with radius 1 unit. If a central angle of a unit circle in the xy-plane centered at the origin has its starting side on the positive x-axis and its terminal side intersects the circle at a point ^x,yh, then the value of the tangent of the 38 SAT PRACTICE TEST #5 ANSWER EXPLANATIONS SAT ANSWER EXPLANATIONS n MATH: MODULE 1 central angle is equal to the y-coordinate divided by the x-coordinate. There are r 92r r 92 15+2 2 radians in a circle. Dividing 3 by 2 yields 6, which is equivalent to 3. It 92r follows that on the unit circle centered at the origin in the xy-plane, the angle 3 15 is the result of revolutions from its starting side on the positive x-axis followed 2r 92r 2r by a rotation through 3 radians. Therefore, the angles 3 and 3 are coterminal tan 92r tan 2r 2r r angles and e 3 o is equal to e3o. Since 3 is greater than 2 and less than r , it follows that the terminal side of the angle is in quadrant II and forms an angle r 60° of , or , with the negative x-axis. Therefore, the terminal side of the angle 3 - 1 , 3 tan 2r intersects the unit circle at the point f 2 2 p. It follows that the value of e3o 3 2 - tan 92r - is 1, which is equivalent to 3. Therefore, the value of e 3 o is 3. - 2 1 92r tan 92r Choice B is incorrect. This is the value of tan e 3 o , not e 3 o. Choice C is 1 tan 92r incorrect. This is the value of tan r , not b 3 l. Choice D is incorrect. This is the d3n tan r tan 92r value of a3k, not e 3 o.</p>","correct_answer":["A"],"has_media":false,"has_mathml":false,"has_table":false,"source_created_at":null,"source_updated_at":null,"options":[{"label":"A","content_html":"<p>− 3 −</p>","ord":0},{"label":"B","content_html":"<p>3/3</p>","ord":1},{"label":"C","content_html":"<p>3/3</p>","ord":2},{"label":"D","content_html":"<p>3</p>","ord":3}],"attribution":{"source_id":"cb_practice_pdf","source_name":"College Board full-length SAT practice tests (PDF)","rights_holder":"College Board","canonical_url":"https://satsuite.collegeboard.org/practice/practice-tests/paper","retrieved_from":"https://satsuite.collegeboard.org/practice/practice-tests/paper","attribution":"Full-length SAT practice tests 4–11 © College Board, published free at satsuite.collegeboard.org.","disclaimer":"Extracted from PDF layout: equations, figures and tables do not survive intact. Use the original PDFs for anything the text renders poorly. SAT® is a trademark registered by the College Board, which is not affiliated with and does not endorse this project.","license":"College Board copyright. Free to download; not licensed for redistribution.","redistributable":false,"item_count":905}}