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11 January, 16:26

1.) What is the relationship between sine & cosine?

a) sinθ=cos (90-θ)

b) sinθ=cos (180-θ)

c) sin90=cos (90-θ)

d) sinθ=cos (30-θ)

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Answers (1)
  1. 11 January, 20:03
    0
    It's A ... cos (90 - theta) = sin theta

    so A
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