7-13  ʹsimpleзźļ򻯡
⣺Enterȷϡ
>> s=2*cos(x)^2-sin(x)^2 ;
ʽ ʹ м򻯡
>> simple(s)
 simplify:
 3*cos(x)^2-1

radsimp:
 2*cos(x)^2-sin(x)^2
combine(trig):
3/2*cos(2*x)+1/2
factor:
2*cos(x)^2-sin(x)^2
expand:
 2*cos(x)^2-sin(x)^2
combine:
3/2*cos(2*x)+1/2
convert(exp):
 
2*(1/2*exp(i*x)+1/2/exp(i*x))^2+1/4*(exp(i*x)-1/exp(i*x))^2
convert(sincos):
 2*cos(x)^2-sin(x)^2
convert(tan):
 2*(1-tan(1/2*x)^2)^2/(1+tan(1/2*x)^2)^2-4*tan(1/2*x)^2/(1+tan(1/2*x)^2)^2
collect(x):
2*cos(x)^2-sin(x)^2
mwcos2sin:
2-3*sin(x)^2
ans =
3*cos(x)^2-1
>>
