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    Precalculus
  4. Exam
    Exam 32: Verifying Trigonometric Equations
  5. Question
    Evaluate the Following Expression. ​
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Evaluate the Following Expression. ​

Question 21

Question 21

Multiple Choice

Evaluate the following expression. ​
(1 + sin 5y) (1 + sin (- 5y) )
​


A) sin25y
B) cos22y
C) - sin25y
D) - cos25y
E) cos25y

Correct Answer:

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