已知函数f(x)=sin( - x)coswx+cos已知函数f(x)=sin(pai-wx)coswx+cos平方wx
2024-05-031个回答
已知函数f(x)=2cos x sin(x+pai/6)-sin^2x+cos^2x.
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已知函数Y=2sin^X+2sinXcosX-5cos^X 已知函数Y=2sin^X+2sinXcosX-5cos^X,
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已知函数f(x)=x2+(sinα-2cosα)x+1是偶函数 则sinαcosα=
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sin cos三角函数题解已知α为锐角 sinα=3cosα 求sinαcosα
2024-05-032个回答
刚学完三角函数,1.已知COS∝/(1+SIN∝)=A,SIN∝/(1+COS∝)=B,A-B=k(COS∝-SIN∝)
2024-05-031个回答
would you please tell me _ a.what to do b.how to do it c.whe
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英语!英语!Please tell me_____next.A how to do B what to do it C
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what will you do if you are asleep?please tell me the way to
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Please tell me____to improve my English. 为什么填what to do
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Would you please tell me what to do next? do 为及物动词后跟宾语,为什么wh
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would you please tell me()next A how to do B what to do C wh
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Could you tell me ___ to do next,please?填what还是how?
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Would you please tell me __ next?A.how to do B.what to do C.
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what do you want me to tell your mother Please tell her .abo
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Please tell me____to improve my English.为什么填what to do
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Please tell me__next?A how to do Bwhat to do C to do what D
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Would you please tell me what to do it 对吗,how to do 后面可以接it吗
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Please tell me what to do是一个完整的句子吗?what to do是作宾语吗
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两种单质点燃生成化合物的表达式两种不同元素的原子.这两种元素分别组成的单质
2024-05-034个回答
你能帮帮他们吗
修一条路,第一天修了1/3,第二天修了剩下的1/2,还剩200米,这条路共有多少米?(急!)
2024-05-074个回答
修一条路,第一天修了全长的五分之一,第二天修了余下的25%,还剩300米没修,这条路一共有多长?
2024-05-075个回答
1.有一条铁丝,第一次用去它的一半少2米,第二次用去剩下的一半多2米,最后还剩4米.问这条铁丝原来长多少米?
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一道小学数学题,求解!题目:一个三角形的地带,其3条边的长度分别是120m, 80m和150m. 如果每隔10m种一颗树
2024-05-025个回答
she told me a lot of _____ideas about my trip to Britain.(he
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