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共找到 12551 与By=sin 相关的结果,耗时2 ms
直线l1:Ax+By+C1=0关于直线l2:Ax+By+C2=0(C1≠C2)对称的直线方程是()A.Ax+By+(C1-2C2)=0B.Ax+By+(C2-2C1)=0C.Ax+By+(2C2-C1)=0D.Ax+By+(2C1-C2)=0
数学
数学难题已知ax+by=3,ax^2+by^2=7ax^3+by^3=16,ax^4+by^4=42求:ax^5=by^5的值谢谢啦~~~是ax^5+by^5的值是多少
数学
在△ABC中,已知(a^2+b^2)sin(A-B)=(a^2-b^2)sinC,则△ABC是什么△?求解第②到第③是怎么来的?答案①(a^2+b^2)sin(A-B)=(a^2-b^2)sinC②(sin^A+sin^B)sin(A-B)=(sin^A-sin^B)s
数学
sin(A+B) ③sin^
I go to school on foot.She goes to school by bike.he goes to school by subway.I go to school on foot.She goes to school by bike.he goe
英语
to school by
The car was invented by him.对him进行提问怎么变?是by whom was the car invented?还是 whom was the car invented by?还是 by whom the car was invented?
英语
是以上都不对希望给出详解.b
证明以下三角等式成立,sin3β*sinγ*sin(60°-γ)/(sin3γ*sinβ*sin(60°-β))=sin(60°+β)/sin(60证明以下三角等式成立sin3β*sinγ*sin(60°-γ)/(sin3γ*sinβ*sin(60°-β))=sin(
数学
60°+β)/sin(60°
若abxy满足ax+by=3,ax^2+by^2=7,ax^3+by^3=16,ax^4+by^4=42,求ax^5+by^5的值
数学
1.若a,b,x,y满足ax+by=3,ax^2+by^2=7,ax^3+by^3=16,ax^4+by^4=42,求ax^5+by^5的值2.已知等式k²x+2(k-1)y+(2-k-k²)z=1与k值无关,求x,y,z的值
数学
数学题问答(三角函数)已知sinα的值,在区间[﹣pai/2,pai/2]内求角αsinα=√3/2;sinα=﹣√2/2;sinα=﹣1/2;sinα=1;sinα=1/4;sinα=﹣5/8;sinα=0.688;sinα=﹣0.123.已知sinα的值,在区间[
数学
值,在区间[﹣pai,pai
命题“若α=β,则sinα=sinβ”的否命题是()A.若sinα=sinβ,则α=βB.若α=β,则sinα≠sinβC.若sinα≠sinβ,则α≠βD.若α≠β,则sinα≠sinβ
数学
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