Mathematics B Regents High School Examination - The University Of The State Of New York, 2007 Page 13
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28Part III
Answer all questions in this part. Each correct answer will receive 4 credits. Clearly indicate the
necessary steps, including appropriate formula substitutions, diagrams, graphs, charts, etc. For all
questions in this part, a correct numerical answer with no work shown will receive only 1 credit. [
]
24
27 Find, to the nearest degree, all values of in the interval 0° ≤ ≤ 180°
2
that satisfy the equation 8 cos
– 2 cos
– 1 = 0.
[13]
[OVER]
Math. B – Jan. ’07
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