1.已知sinα=(2√5)/5,(π/2)<α<π,则tanα的值是多少?(详解,注:√为根号)2.若(-4,3)是角α终边上一点,则(cosα·tanα)/(sinα·cotα)的值为多少?(详解)3.若角α的终边经过点P(5t,12t)(t≠0),求log5(|secα
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![1.已知sinα=(2√5)/5,(π/2)<α<π,则tanα的值是多少?(详解,注:√为根号)2.若(-4,3)是角α终边上一点,则(cosα·tanα)/(sinα·cotα)的值为多少?(详解)3.若角α的终边经过点P(5t,12t)(t≠0),求log5(|secα](/uploads/image/z/5395440-48-0.jpg?t=1.%E5%B7%B2%E7%9F%A5sin%CE%B1%3D%282%E2%88%9A5%29%2F5%2C%28%CF%80%2F2%29%EF%BC%9C%CE%B1%EF%BC%9C%CF%80%2C%E5%88%99tan%CE%B1%E7%9A%84%E5%80%BC%E6%98%AF%E5%A4%9A%E5%B0%91%3F%EF%BC%88%E8%AF%A6%E8%A7%A3%2C%E6%B3%A8%3A%E2%88%9A%E4%B8%BA%E6%A0%B9%E5%8F%B7%EF%BC%892.%E8%8B%A5%28-4%2C3%29%E6%98%AF%E8%A7%92%CE%B1%E7%BB%88%E8%BE%B9%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E5%88%99%28cos%CE%B1%C2%B7tan%CE%B1%29%2F%28sin%CE%B1%C2%B7cot%CE%B1%29%E7%9A%84%E5%80%BC%E4%B8%BA%E5%A4%9A%E5%B0%91%3F%EF%BC%88%E8%AF%A6%E8%A7%A3%EF%BC%893.%E8%8B%A5%E8%A7%92%CE%B1%E7%9A%84%E7%BB%88%E8%BE%B9%E7%BB%8F%E8%BF%87%E7%82%B9P%285t%2C12t%29%EF%BC%88t%E2%89%A00%29%2C%E6%B1%82log5%28%7Csec%CE%B1)
1.已知sinα=(2√5)/5,(π/2)<α<π,则tanα的值是多少?(详解,注:√为根号)2.若(-4,3)是角α终边上一点,则(cosα·tanα)/(sinα·cotα)的值为多少?(详解)3.若角α的终边经过点P(5t,12t)(t≠0),求log5(|secα
1.已知sinα=(2√5)/5,(π/2)<α<π,则tanα的值是多少?(详解,注:√为根号)
2.若(-4,3)是角α终边上一点,则(cosα·tanα)/(sinα·cotα)的值为多少?(详解)
3.若角α的终边经过点P(5t,12t)(t≠0),求log5(|secα-tanα|)的值.(详解)
1.已知sinα=(2√5)/5,(π/2)<α<π,则tanα的值是多少?(详解,注:√为根号)2.若(-4,3)是角α终边上一点,则(cosα·tanα)/(sinα·cotα)的值为多少?(详解)3.若角α的终边经过点P(5t,12t)(t≠0),求log5(|secα
1.sinα=(2√5)/5,(π/2)<α<π
cos=-√5/5
tanα=-2
2.(cosα·tanα)/(sinα·cotα)=tana =-3/4
3.secα是什么?