• tan 2x - √3 = 0
    tan 2x = √3
    tan 2x = tan 60°
    2x = 60° + k.180°
    x = (60° + k.180°)/2
    x = 30° + k.90°
    k bilangan bulat

    0° < x < 360°

    HP = {30° , 120°, 210° , 300°}

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