已知sin(x+π/6)=1/4,则sin(7π+x)+sin^2(5π/6-x)的值我只知道前面那一项等于1/4,后面的就不知道怎么算了~前面一项题目应该是:sin(7π/6+X) 抱歉打错了- -
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![已知sin(x+π/6)=1/4,则sin(7π+x)+sin^2(5π/6-x)的值我只知道前面那一项等于1/4,后面的就不知道怎么算了~前面一项题目应该是:sin(7π/6+X) 抱歉打错了- -](/uploads/image/z/1105098-42-8.jpg?t=%E5%B7%B2%E7%9F%A5sin%28x%2B%CF%80%2F6%29%3D1%2F4%2C%E5%88%99sin%287%CF%80%2Bx%29%2Bsin%5E2%285%CF%80%2F6-x%29%E7%9A%84%E5%80%BC%E6%88%91%E5%8F%AA%E7%9F%A5%E9%81%93%E5%89%8D%E9%9D%A2%E9%82%A3%E4%B8%80%E9%A1%B9%E7%AD%89%E4%BA%8E1%2F4%2C%E5%90%8E%E9%9D%A2%E7%9A%84%E5%B0%B1%E4%B8%8D%E7%9F%A5%E9%81%93%E6%80%8E%E4%B9%88%E7%AE%97%E4%BA%86%7E%E5%89%8D%E9%9D%A2%E4%B8%80%E9%A1%B9%E9%A2%98%E7%9B%AE%E5%BA%94%E8%AF%A5%E6%98%AF%EF%BC%9Asin%287%CF%80%2F6%2BX%29+%E6%8A%B1%E6%AD%89%E6%89%93%E9%94%99%E4%BA%86-+-)
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