Answers Precalculus Practice ExamQuestion 14

14

practice examMultiple Choice

Practice Exam

Question 14 • Precalculus

On interval 0 is less than or equal to x comma x is less than 2 pi , where are the x -intercepts of y is equal to cosine of 2 x ?

Answer

A

pi over 2 and the fraction with numerator 3 mathrm pi and denominator 2

B

pi over 4 , 3 pi over 4 , 5 pi over 4 , and the fraction with numerator 7 mathrm pi and denominator 4

C

pi over 2 , pi , and the fraction with numerator 3 mathrm pi and denominator 2

D

0 , pi , and 2 pi

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