1、例3。simple和simplify的区别。syms x f=cos(x)2+sin(x)2;simple(f)simplify:1 radsimp:cos(x)2+sin(x)2 combine(trig):1factor:cos(x)2+sin(x)2expand:cos(x)2+sin(x)2 combine:1convert(exp):(1/2*exp(i*x)+1/2/exp(i*x)2-1/4*(exp(i*x)-1/exp(i*x)2 convert(sincos):cos(x)2+sin(x)2 convert(tan):(1-tan(1/2*x)2)2/(1+tan(1/2*
2、x)2)2+4*tan(1/2*x)2/(1+tan(1/2*x)2)2collect(x):cos(x)2+sin(x)2mwcos2sin:1ans=1 simplify(f)ans=1njz=d/(a*d-b*c),-b/(a*d-b*c)-c/(a*d-b*c),a/(a*d-b*c)hls=a*d-b*cans=-conj(1/2*d-1/2*a-1/2*(d2-2*a*d+a2+4*b*c)(1/2)/c),1-conj(1/2*d-1/2*a+1/2*(d2-2*a*d+a2+4*b*c)(1/2)/c),1 ans=1/2*d+1/2*a+1/2*(d2-2*a*d+a2+4*
3、b*c)(1/2)1/2*d+1/2*a-1/2*(d2-2*a*d+a2+4*b*c)(1/2)fxnnfxfffxyzgggxyzhhhxyz 000()()limxf xxf xx 111,100hhyeeyxxhh即2125yxx22cos2cos2yxxsin34xy 4lnlnyx()()xx tyy t()()dyy tdxx t(sin)(1 cos)xa ttyatdydx222uxyz1()yzarctgx2yzx22222,zzzxyx y 22zx22zy2zx y lnyxxeedydx(,)lnyxF x yxeexFyFxFyFsin()cos()()0 xyyztg xz,zzxy()sin()cos()()F xxyyztg xz,xyzF F F1(1)(1)yxxsin lnyxxx2212sinyx22ln()yxxa44xtyt 2ln(1)xtytarctgt 22lnyarctgxyxyxxycosxyexsinxyex220yyy2sin()zxxyzxuyln()uxxy22222,uuuxyx y,zzxy222coscoscos1xyzzexyz
