职教组卷基于海量职教高考试题库建立的在线组卷及学习系统
职教组卷
  • 题型:选择题 题类:期中考试 难易度:中档

    已知\(\sin \theta +\cos \theta =\dfrac{4}{3}\),\(\theta \in \left( \dfrac{\pi }{4},\dfrac{\pi }{2} \right)\),则\(\sin \theta -\cos \theta = (\)   \()\)
    A. \(\dfrac{\sqrt{2}}{3}\) B. \(-\dfrac{\sqrt{2}}{3}\) C. \(\dfrac{1}{3}\) D. \(-\dfrac{1}{3}\)
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