Forgot password?
 Register account
View 2061|Reply 2

[函数] 三角最值

[Copy link]

12

Threads

10

Posts

131

Credits

Credits
131

Show all posts

957683999 Posted 2014-10-28 12:38 |Read mode
Last edited by hbghlyj 2025-4-23 10:57$\triangle A B C$ 中求 $f(A, B, C)=\sin A \cos ^2 B \cos ^2 C+\sin B \cos ^2 C \cos ^2 A+\sin C \cos ^2 A \cos ^2 B$ 的最值

686

Threads

110K

Posts

910K

Credits

Credits
91229
QQ

Show all posts

kuing Posted 2014-10-28 13:15
下确界为0,B=C->90时“取”
最大值遇到四次方程,放弃ing

686

Threads

110K

Posts

910K

Credits

Credits
91229
QQ

Show all posts

kuing Posted 2014-11-4 21:20
这道题哪来的,或者有何背景么?

Mobile version|Discuz Math Forum

2025-5-31 10:50 GMT+8

Powered by Discuz!

× Quick Reply To Top Edit