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25-04-2021
Mathematics

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Which expression is equivalent to sin (1) cos(17) - cos (1) sin(15.)?

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25-04-2021

Answer:

os 36°: The cosine of 36 degrees can be calculated by using a pentagon. ... sin 18° and sin 72°: Taking the equivalent sine and cosine values of 15° and 18° on ... I angle (the "I" in this expression stands for th

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