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14 January, 00:00

Solve the equation

sin (x° - 20°) = cos 42° for x, where 0 < x <90

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Answers (1)
  1. 14 January, 00:13
    0
    Cos (90° - x + 20°) = cos 42°

    110° - x = 42° = > x = 110° - 42° = > x = 68°
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