设f(α)=2sinαcosα+cosα/1+sin²α+cos(3π/2+α)-sin²(π/2+α) (1+2sinα不等于0)则f(1度)×f(2度)×(3度)‘’‘’‘’‘’‘’‘’‘’‘’‘f(89度)的值为
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![设f(α)=2sinαcosα+cosα/1+sin²α+cos(3π/2+α)-sin²(π/2+α) (1+2sinα不等于0)则f(1度)×f(2度)×(3度)‘’‘’‘’‘’‘’‘’‘’‘’‘f(89度)的值为](/uploads/image/z/5101591-31-1.jpg?t=%E8%AE%BEf%28%CE%B1%29%3D2sin%CE%B1cos%CE%B1%2Bcos%CE%B1%2F1%2Bsin%26%23178%3B%CE%B1%2Bcos%283%CF%80%2F2%2B%CE%B1%29-sin%26%23178%3B%28%CF%80%2F2%2B%CE%B1%29+%EF%BC%881%2B2sin%CE%B1%E4%B8%8D%E7%AD%89%E4%BA%8E0%EF%BC%89%E5%88%99f%281%E5%BA%A6%EF%BC%89%C3%97f%282%E5%BA%A6%EF%BC%89%C3%97%EF%BC%883%E5%BA%A6%EF%BC%89%E2%80%98%E2%80%99%E2%80%98%E2%80%99%E2%80%98%E2%80%99%E2%80%98%E2%80%99%E2%80%98%E2%80%99%E2%80%98%E2%80%99%E2%80%98%E2%80%99%E2%80%98%E2%80%99%E2%80%98f%2889%E5%BA%A6%EF%BC%89%E7%9A%84%E5%80%BC%E4%B8%BA)
设f(α)=2sinαcosα+cosα/1+sin²α+cos(3π/2+α)-sin²(π/2+α) (1+2sinα不等于0)则f(1度)×f(2度)×(3度)‘’‘’‘’‘’‘’‘’‘’‘’‘f(89度)的值为
设f(α)=2sinαcosα+cosα/1+sin²α+cos(3π/2+α)-sin²(π/2+α) (1+2sinα不等于0)则f(1度)×f(2度)×(3度)‘’‘’‘’‘’‘’‘’‘’‘’‘f(89度)的值为
设f(α)=2sinαcosα+cosα/1+sin²α+cos(3π/2+α)-sin²(π/2+α) (1+2sinα不等于0)则f(1度)×f(2度)×(3度)‘’‘’‘’‘’‘’‘’‘’‘’‘f(89度)的值为
把f(a)中的分子与分母用中括号括起来;想知道哪些是分子哪些是分母;
合肥三十六好厉害啊,像这种题目可以使用特殊值法,如果是选择题的话。
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