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 ... 1) 2) - cos2 e — cos2x and Y and Y sin — cosx + 2 1/2 SOLUTIONS cos2S and y = sine (To find solutions, set equations equal to each other) 1 1 2sin cos2 2 sin sm sm sm ................
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