Contact us
Choose a category below so we can get back to you as quickly as possible.
根據餘弦函數的值域可得要使cosx=1-m有意義,-1≤1-m≤1,解得 0≤m≤2,故選C.
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.