求高手帮忙化简f(x)=(sin2x+cos2x+1)/(根号2*sin(π/4+x))+cos(π/2+π)

问题描述:

求高手帮忙化简f(x)=(sin2x+cos2x+1)/(根号2*sin(π/4+x))+cos(π/2+π)