Contact us
Choose a category below so we can get back to you as quickly as possible.
sin2x-2sinx+cosx-1=2sinxcosx-2sinx+cosx-1=(2sinx+1)(cosx-1)那只有只有x=0咯關於這題就不多說了,相信你是那種基礎比較差的那種,建議以後多注意因式分解的變化,學三角一定要多練,數學是可以經過努力很快提高的,但…
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.