解直角三角形的题目如图,如果△APB绕B按逆时针旋转30°后得到A'P'B',且BP=2,那么PP'=——————(不去近似值,sin15°=(√6-√2)/4,cos15°=(√6+√2)/4)
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![解直角三角形的题目如图,如果△APB绕B按逆时针旋转30°后得到A'P'B',且BP=2,那么PP'=——————(不去近似值,sin15°=(√6-√2)/4,cos15°=(√6+√2)/4)](/uploads/image/z/11548484-44-4.jpg?t=%E8%A7%A3%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E9%A2%98%E7%9B%AE%E5%A6%82%E5%9B%BE%2C%E5%A6%82%E6%9E%9C%E2%96%B3APB%E7%BB%95B%E6%8C%89%E9%80%86%E6%97%B6%E9%92%88%E6%97%8B%E8%BD%AC30%C2%B0%E5%90%8E%E5%BE%97%E5%88%B0A%27P%27B%27%2C%E4%B8%94BP%3D2%2C%E9%82%A3%E4%B9%88PP%27%3D%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%EF%BC%88%E4%B8%8D%E5%8E%BB%E8%BF%91%E4%BC%BC%E5%80%BC%2Csin15%C2%B0%3D%EF%BC%88%E2%88%9A6-%E2%88%9A2%EF%BC%89%2F4%2Ccos15%C2%B0%3D%EF%BC%88%E2%88%9A6%2B%E2%88%9A2%EF%BC%89%2F4%EF%BC%89)
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