1. Which of the following is a solution to the equation 2sin^2x+sinx=1 I. x=30° II. x=150° III. x=270° a)III only b)I and III only c) II and III only d)I, II, III I tried substitution but I dont think it works
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Dear ceroseven, Hope this helps.
Originally Posted by ceroseven 1. Which of the following is a solution to the equation 2sin^2x+sinx=1 I. x=30° II. x=150° III. x=270° a)III only b)I and III only c) II and III only d)I, II, III I tried substitution but I dont think it works Let so that the equation becomes or or . So or or , where represents the number of times you have gone around the unit circle. Can you see which solutions fit now?
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