Question: / cos = 2. 1-2 da. (You may find the following facts useful for this problem: cos sin(20) = 2 sin cos 0) =
/ cos = 2. 1-2 da. (You may find the following facts useful for this problem: cos sin(20) = 2 sin cos 0) = 12 2 1 + cos(20), and 2
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