SOLUTION: Use a Double- or Half-Angle Formula to solve the equation in the interval [0, 2π). (Enter your answers as a comma-separated list. Round your answers to three decimal places wh
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Question 672828: Use a Double- or Half-Angle Formula to solve the equation in the interval [0, 2π). (Enter your answers as a comma-separated list. Round your answers to three decimal places where appropriate.)
sin 2θ + sin θ = 0
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
sin(2t) + sin(t) = 0
2sin(t)cos(t) + sin(t) = 0
sin*(2cos + 1) = 0
sin(t) = 0
t = 0, pi
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cos = -1/2
t = 2p/3, 4pi/3
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