y=Sin(1/(x+1))+ exp(1/(x+1)) 有没有反函数?过程
2Cos2x + 4SinxCosx= 2^0.5 求解,要过程
2cos2x+4sinxcosx
=cos2x+2sinxcosx
=cos2x+sin2x
=2^0.5*sin2x
=2^0.5/2
2x=pi/6
x=pi/12