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12 April, 00:04

Which of these is equal to sin (70°) ?

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  1. 12 April, 00:22
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    Cos (20°) = Sin (70°) < - - - The answer

    70° and 20° are complementary angles, meaning they add up to 90°. So the cosine 20° is the same as the sine or sin of its complementary angle.
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