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追風(fēng)的風(fēng)新蟲 (小有名氣)
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[求助]
小女子公式求助,各位大神幫幫啦! 已有3人參與
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| 我有一個(gè)公式,需要求出x,s=2R*sin(x/2)+p*tan(x/2),各位大神這個(gè)該怎么求,謝啦。╯,R,p當(dāng)做已知) |

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Matlab 的solve命令! 例如! >> solve('2*sin(x/2)+3*tan(x/2)=2','x') ans = [ 2*atan((2/3*(-3/4+1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+1/4*((6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)-9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2))^3+(-3/4+1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+1/4*((6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)-9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2))^2-1)/(-3/4+1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+1/4*((6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)-9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2)))] [ 2*atan((2/3*(-3/4+1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-1/4*((6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)-9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2))^3+(-3/4+1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-1/4*((6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)-9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2))^2-1)/(-3/4+1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-1/4*((6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)-9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2)))-2*pi] [ 2*atan(2/3*(-3/4-1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+1/4*i*((-6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)+9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2))^3+(-3/4-1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+1/4*i*((-6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)+9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2))^2-1,-3/4-1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+1/4*i*((-6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)+9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2))] [ 2*atan(2/3*(-3/4-1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-1/4*i*((-6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)+9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2))^3+(-3/4-1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-1/4*i*((-6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)+9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2))^2-1,-3/4-1/4*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)-1/4*i*((-6*(315+72*19^(1/2))^(1/3)*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)*(315+72*19^(1/2))^(2/3)+9*(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2)+48*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3)/(((315+72*19^(1/2))^(2/3)+9+3*(315+72*19^(1/2))^(1/3))/(315+72*19^(1/2))^(1/3))^(1/2))^(1/2))] >> double(ans) ans = 0.7824 -4.5525 5.0266 - 2.6622i 5.0266 + 2.6622i |

鐵桿木蟲 (正式寫手)
新蟲 (小有名氣)

木蟲 (正式寫手)

木蟲 (正式寫手)

木蟲 (正式寫手)

新蟲 (小有名氣)

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