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Solve on the interval 0 ≤ θ < 2π Cos(2θ-π/2)=-1
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Solve on the interval 0 ≤ θ < 2π
Cos(2θ-π/2)=-1

User Fpierrat
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1 Answer

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cos ( 2 t - π/2 ) = - 1
2 t - π/2 = π
2 t = π + π/2
2 t = 3π/2
t = 3π/2 : 2
t = 3π/4 = 135°
User Jose Alban
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8.2k points
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