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13 June, 01:34

In triangle ABC, angle C is the right angle. Which statement is always true? A. Sin (A) = cos (A)

B. Sin (A) = cos (B)

C. Sin (A) = cos (C)

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Answers (2)
  1. 13 June, 01:36
    0
    The answer is B. Sin (A) = cos (B).
  2. 13 June, 01:41
    0
    Given this, we know:

    A+B+90° = 180°

    Therefore:

    90°-A = B and 90°-B = A

    We also know:

    sin (A) = a/c

    cos (B) = a/c

    therefore,

    Sin (A) = Cos (B)
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