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1 September, 21:42

Which relationship in the triangle must be true?

TE

sin (B) = sin (A)

sin (B) = cos (90 - B)

COS (B) = sin (180 - B)

COS (B) = cos (A)

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Answers (1)
  1. 1 September, 21:50
    0
    COS (B) = sin (180-B).

    Because a triangle have a 180 degree angle
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