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22 January, 09:17

Let ∠X and ∠Y be complementary. If sin (X) = 3/5

and cos (X) = 4/5. then what is the value of sin (Y) ?

A) 3/5

B) 4/5

C) 5/4

D) 5/3

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Answers (1)
  1. 22 January, 10:39
    0
    Since they are complementary

    x + y = 90

    Sin (o) = Cos (90-0)

    Therefore, Cos x = Sin y = 4/5 [ Because x and y are complementary]
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