Trigonometry Identities I Introduction - Math Plane

1) cos Solve the following For O < 2Cos 2Cos < 360 Subtract 2Cose from both sides (This produces an equation = 0) Factor out Cos e Separate and solve e Cot 2Cos Cos Cos Cos e Cot e Cot (Cot 2) (Cot Cot 26.6 or 206.6 Cos 90 or 270 *Note: At the beginning, we didn't divide both sides by Cosine. (this could cancel possible solutions). ................
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