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21 May, 12:43

Solve on the interval 0 ≤ θ < 2π

Cos (2θ-π/2) = - 1

+1
Answers (1)
  1. 21 May, 13:02
    0
    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°
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