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9 March, 20:08

The cosine of the complimentary angle to 57° a. 0.98 c. - 0.01 b. 0.13 d. 0.84

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  1. 9 March, 20:28
    0
    Complementary angles: angles whose measures add up to 90 degrees.

    x+57=90

    x=33 degrees

    cosine (33) = 0.83867056794542

    0.83867056794542 rounded to the nearest hundredth is 0.84

    The correct answer is D) 0.84
  2. 9 March, 20:35
    0
    Since these are complementary angles (both summing to 90°)

    This is equal to sin57° which is approximately:

    sin57≈0.838 or 0.84 to nearest hundredth ...

    (because sinα=cos (90-α))
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