Chuyen de Bat Dang Thuc Luong Giac (Cac Ky Hieu Thuong Dung)
Transcript of Chuyen de Bat Dang Thuc Luong Giac (Cac Ky Hieu Thuong Dung)
-
8/14/2019 Chuyen de Bat Dang Thuc Luong Giac (Cac Ky Hieu Thuong Dung)
1/1
Trung THPT chuyn L T Trng Bt ng thc lng gic
The Inequalities Trigonometry iii
Cc k hiu thng dng :
Trong chuyn ny, ta dng gn nh xuyn sut cc k hiu sau y :
ABC : tam gic ABC
CBA ,, : cc gc ca tam gic ABC
cba ,, : cc cnh i din ln lt vi cc gc CBA ,,
cba hhh ,, : cc ng cao ng vi cc cnh
cba mmm ,, : cc ng trung tuyn ng vi cc cnh
cba lll ,, : cc ng phn gic ng vi cc gc
SRrp ,,, na chu vi ,bn knh ni tip,bn knh ngoi tip, din tch tam gic ABC
cba rrr ,, bn knh ng trnbng tip ng vi cc gc
CMR : chng minh rng
pcm : iuphi chng minh.