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18 December, 10:06

NI

The cosine of 50 degrees is 0.64. What is the sine of 40 degrees?

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  1. 18 December, 13:55
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    Step-by-step explanation:

    sin (90° - ∅) = Cosine ∅

    40 = 90 - 50

    sin (40°) = sin (90° - 50°) = Cosine 50° = 0.64

    sin (40°) = 0.64
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