Contact us
Choose a category below so we can get back to you as quickly as possible.
作出組織圓,組織圓與坐標軸交於點A(1,0),B(0,1). 設角α的終邊交組織圓於點P,過點P作PM⊥x軸, 根據三角函數線的知識可知:MP =sinα,OM=cosα, 在RT△PMO中,MP+OM>OP, 即sinα+cosα>1. 又因△POA的面積<扇形POA的面積, 所以1/2•;OA•;MP
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.