arctan(x/12)-arctan(x/10)-arctan(x/20)=-40最好能用matlab解.arctan(x/12)-arctan(x/10)-arctan(x/20)=-40/180*pi

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arctan(x/12)-arctan(x/10)-arctan(x/20)=-40最好能用matlab解.arctan(x/12)-arctan(x/10)-arctan(x/20)=-40/180*pi
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arctan(x/12)-arctan(x/10)-arctan(x/20)=-40最好能用matlab解.arctan(x/12)-arctan(x/10)-arctan(x/20)=-40/180*pi
arctan(x/12)-arctan(x/10)-arctan(x/20)=-40
最好能用matlab解.
arctan(x/12)-arctan(x/10)-arctan(x/20)=-40/180*pi

arctan(x/12)-arctan(x/10)-arctan(x/20)=-40最好能用matlab解.arctan(x/12)-arctan(x/10)-arctan(x/20)=-40/180*pi
鐢∕APLE瑙Ⅻbr/>> fsolve(arctan(x/12)-arctan(x/10)-arctan(x/20)=-40/180*Pi);
13.96972563
鐢∕ATLAB瑙Ⅻbr/>濂介夯鐑︾殑缁撴灉
>> x=solve('arctan(x/12)-arctan(x/10)-arctan(x/20)=-40/180*pi')
x =
2/3*(14580*cos(5/18*pi)-19440*cos(5/18*pi)*sin(5/18*pi)^2+157464*cos(5/18*pi)^3-629856*cos(5/18*pi)^3*sin(5/18*pi)^2+839808*cos(5/18*pi)^3*sin(5/18*pi)^4-373248*cos(5/18*pi)^3*sin(5/18*pi)^6+60*(-11337408*cos(5/18*pi)^4*sin(5/18*pi)^2-20155392*cos(5/18*pi)^4*sin(5/18*pi)^6+2125764*cos(5/18*pi)^4+22674816*cos(5/18*pi)^4*sin(5/18*pi)^4+480+6718464*cos(5/18*pi)^4*sin(5/18*pi)^8+24057*cos(5/18*pi)^2-64152*cos(5/18*pi)^2*sin(5/18*pi)^2+42768*cos(5/18*pi)^2*sin(5/18*pi)^4)^(1/2))^(1/3)-150*(8/15-324/25*cos(5/18*pi)^2+864/25*cos(5/18*pi)^2*sin(5/18*pi)^2-576/25*cos(5/18*pi)^2*sin(5/18*pi)^4)/(14580*cos(5/18*pi)-19440*cos(5/18*pi)*sin(5/18*pi)^2+157464*cos(5/18*pi)^3-629856*cos(5/18*pi)^3*sin(5/18*pi)^2+839808*cos(5/18*pi)^3*sin(5/18*pi)^4-373248*cos(5/18*pi)^3*sin(5/18*pi)^6+60*(-11337408*cos(5/18*pi)^4*sin(5/18*pi)^2-20155392*cos(5/18*pi)^4*sin(5/18*pi)^6+2125764*cos(5/18*pi)^4+22674816*cos(5/18*pi)^4*sin(5/18*pi)^4+480+6718464*cos(5/18*pi)^4*sin(5/18*pi)^8+24057*cos(5/18*pi)^2-64152*cos(5/18*pi)^2*sin(5/18*pi)^2+42768*cos(5/18*pi)^2*sin(5/18*pi)^4)^(1/2))^(1/3)+36*cos(5/18*pi)-48*cos(5/18*pi)*sin(5/18*pi)^2
-1/3*(14580*cos(5/18*pi)-19440*cos(5/18*pi)*sin(5/18*pi)^2+157464*cos(5/18*pi)^3-629856*cos(5/18*pi)^3*sin(5/18*pi)^2+839808*cos(5/18*pi)^3*sin(5/18*pi)^4-373248*cos(5/18*pi)^3*sin(5/18*pi)^6+60*(-11337408*cos(5/18*pi)^4*sin(5/18*pi)^2-20155392*cos(5/18*pi)^4*sin(5/18*pi)^6+2125764*cos(5/18*pi)^4+22674816*cos(5/18*pi)^4*sin(5/18*pi)^4+480+6718464*cos(5/18*pi)^4*sin(5/18*pi)^8+24057*cos(5/18*pi)^2-64152*cos(5/18*pi)^2*sin(5/18*pi)^2+42768*cos(5/18*pi)^2*sin(5/18*pi)^4)^(1/2))^(1/3)+75*(8/15-324/25*cos(5/18*pi)^2+864/25*cos(5/18*pi)^2*sin(5/18*pi)^2-576/25*cos(5/18*pi)^2*sin(5/18*pi)^4)/(14580*cos(5/18*pi)-19440*cos(5/18*pi)*sin(5/18*pi)^2+157464*cos(5/18*pi)^3-629856*cos(5/18*pi)^3*sin(5/18*pi)^2+839808*cos(5/18*pi)^3*sin(5/18*pi)^4-373248*cos(5/18*pi)^3*sin(5/18*pi)^6+60*(-11337408*cos(5/18*pi)^4*sin(5/18*pi)^2-20155392*cos(5/18*pi)^4*sin(5/18*pi)^6+2125764*cos(5/18*pi)^4+22674816*cos(5/18*pi)^4*sin(5/18*pi)^4+480+6718464*cos(5/18*pi)^4*sin(5/18*pi)^8+24057*cos(5/18*pi)^2-64152*cos(5/18*pi)^2*sin(5/18*pi)^2+42768*cos(5/18*pi)^2*sin(5/18*pi)^4)^(1/2))^(1/3)+36*cos(5/18*pi)-48*cos(5/18*pi)*sin(5/18*pi)^2+5*i*3^(1/2)*(1/15*(14580*cos(5/18*pi)-19440*cos(5/18*pi)*sin(5/18*pi)^2+157464*cos(5/18*pi)^3-629856*cos(5/18*pi)^3*sin(5/18*pi)^2+839808*cos(5/18*pi)^3*sin(5/18*pi)^4-373248*cos(5/18*pi)^3*sin(5/18*pi)^6+60*(-11337408*cos(5/18*pi)^4*sin(5/18*pi)^2-20155392*cos(5/18*pi)^4*sin(5/18*pi)^6+2125764*cos(5/18*pi)^4+22674816*cos(5/18*pi)^4*sin(5/18*pi)^4+480+6718464*cos(5/18*pi)^4*sin(5/18*pi)^8+24057*cos(5/18*pi)^2-64152*cos(5/18*pi)^2*sin(5/18*pi)^2+42768*cos(5/18*pi)^2*sin(5/18*pi)^4)^(1/2))^(1/3)+15*(8/15-324/25*cos(5/18*pi)^2+864/25*cos(5/18*pi)^2*sin(5/18*pi)^2-576/25*cos(5/18*pi)^2*sin(5/18*pi)^4)/(14580*cos(5/18*pi)-19440*cos(5/18*pi)*sin(5/18*pi)^2+157464*cos(5/18*pi)^3-629856*cos(5/18*pi)^3*sin(5/18*pi)^2+839808*cos(5/18*pi)^3*sin(5/18*pi)^4-373248*cos(5/18*pi)^3*sin(5/18*pi)^6+60*(-11337408*cos(5/18*pi)^4*sin(5/18*pi)^2-20155392*cos(5/18*pi)^4*sin(5/18*pi)^6+2125764*cos(5/18*pi)^4+22674816*cos(5/18*pi)^4*sin(5/18*pi)^4+480+6718464*cos(5/18*pi)^4*sin(5/18*pi)^8+24057*cos(5/18*pi)^2-64152*cos(5/18*pi)^2*sin(5/18*pi)^2+42768*cos(5/18*pi)^2*sin(5/18*pi)^4)^(1/2))^(1/3))
-1/3*(14580*cos(5/18*pi)-19440*cos(5/18*pi)*sin(5/18*pi)^2+157464*cos(5/18*pi)^3-629856*cos(5/18*pi)^3*sin(5/18*pi)^2+839808*cos(5/18*pi)^3*sin(5/18*pi)^4-373248*cos(5/18*pi)^3*sin(5/18*pi)^6+60*(-11337408*cos(5/18*pi)^4*sin(5/18*pi)^2-20155392*cos(5/18*pi)^4*sin(5/18*pi)^6+2125764*cos(5/18*pi)^4+22674816*cos(5/18*pi)^4*sin(5/18*pi)^4+480+6718464*cos(5/18*pi)^4*sin(5/18*pi)^8+24057*cos(5/18*pi)^2-64152*cos(5/18*pi)^2*sin(5/18*pi)^2+42768*cos(5/18*pi)^2*sin(5/18*pi)^4)^(1/2))^(1/3)+75*(8/15-324/25*cos(5/18*pi)^2+864/25*cos(5/18*pi)^2*sin(5/18*pi)^2-576/25*cos(5/18*pi)^2*sin(5/18*pi)^4)/(14580*cos(5/18*pi)-19440*cos(5/18*pi)*sin(5/18*pi)^2+157464*cos(5/18*pi)^3-629856*cos(5/18*pi)^3*sin(5/18*pi)^2+839808*cos(5/18*pi)^3*sin(5/18*pi)^4-373248*cos(5/18*pi)^3*sin(5/18*pi)^6+60*(-11337408*cos(5/18*pi)^4*sin(5/18*pi)^2-20155392*cos(5/18*pi)^4*sin(5/18*pi)^6+2125764*cos(5/18*pi)^4+22674816*cos(5/18*pi)^4*sin(5/18*pi)^4+480+6718464*cos(5/18*pi)^4*sin(5/18*pi)^8+24057*cos(5/18*pi)^2-64152*cos(5/18*pi)^2*sin(5/18*pi)^2+42768*cos(5/18*pi)^2*sin(5/18*pi)^4)^(1/2))^(1/3)+36*cos(5/18*pi)-48*cos(5/18*pi)*sin(5/18*pi)^2-5*i*3^(1/2)*(1/15*(14580*cos(5/18*pi)-19440*cos(5/18*pi)*sin(5/18*pi)^2+157464*cos(5/18*pi)^3-629856*cos(5/18*pi)^3*sin(5/18*pi)^2+839808*cos(5/18*pi)^3*sin(5/18*pi)^4-373248*cos(5/18*pi)^3*sin(5/18*pi)^6+60*(-11337408*cos(5/18*pi)^4*sin(5/18*pi)^2-20155392*cos(5/18*pi)^4*sin(5/18*pi)^6+2125764*cos(5/18*pi)^4+22674816*cos(5/18*pi)^4*sin(5/18*pi)^4+480+6718464*cos(5/18*pi)^4*sin(5/18*pi)^8+24057*cos(5/18*pi)^2-64152*cos(5/18*pi)^2*sin(5/18*pi)^2+42768*cos(5/18*pi)^2*sin(5/18*pi)^4)^(1/2))^(1/3)+15*(8/15-324/25*cos(5/18*pi)^2+864/25*cos(5/18*pi)^2*sin(5/18*pi)^2-576/25*cos(5/18*pi)^2*sin(5/18*pi)^4)/(14580*cos(5/18*pi)-19440*cos(5/18*pi)*sin(5/18*pi)^2+157464*cos(5/18*pi)^3-629856*cos(5/18*pi)^3*sin(5/18*pi)^2+839808*cos(5/18*pi)^3*sin(5/18*pi)^4-373248*cos(5/18*pi)^3*sin(5/18*pi)^6+60*(-11337408*cos(5/18*pi)^4*sin(5/18*pi)^2-20155392*cos(5/18*pi)^4*sin(5/18*pi)^6+2125764*cos(5/18*pi)^4+22674816*cos(5/18*pi)^4*sin(5/18*pi)^4+480+6718464*cos(5/18*pi)^4*sin(5/18*pi)^8+24057*cos(5/18*pi)^2-64152*cos(5/18*pi)^2*sin(5/18*pi)^2+42768*cos(5/18*pi)^2*sin(5/18*pi)^4)^(1/2))^(1/3))