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19 February, 14:58

Which pair of angles has congruent values for the sin x and the cos y?

A) 42; 42

B) 42; 48

C) 42; 138

D) 42; 132

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Answers (1)
  1. 19 February, 15:15
    0
    Sin x = cos (90-x)

    eg sin 42 = cos (90-42) = cos 48

    so the answer is B
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