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17 September, 21:26

Which expression equals 1?

a. sin (x) + cos (x)

b. sin^2 (x) + cos^2 (x)

c. sin^2 (x) - cos^2 (x)

d. sin (x) - cos (x)

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Answers (1)
  1. 17 September, 21:39
    0
    B. sin^2 (x) + cos^2 (x)
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