配套习题- 余弦定理解三角形 -【青果学院】

1/3单选题

难度：

1.在△ABC中，在△ABC中，∠A，∠B，∠C所对的边分别是a，b，c，若a²=b²+bc+c²，则A为：（）

A	120°
B	60°
C	90°
D	150°

正确答案：QQ==

6Kej77ya4oi15Zyo4pazQUJD5Lit77yMYTxzdXA+Mjwvc3VwPj1iPHN1cD4yPC9zdXA+K2JjK2M8c3VwPjI8L3N1cD7vvIzlj4hhPHN1cD4yPC9zdXA+PWI8c3VwPjI8L3N1cD4rYzxzdXA+Mjwvc3VwPi0yYmNjb3NBPGJyPuKItC0yYmNjb3NBPWJj77yMPGJyPuKItGNvc0E9PGltZyB3aWR0aD0yNiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9DRi85My9yQkFDRTFOSHF2RENMQlFuQUFBQmF5bE1uYWs3NjcucG5nIj7vvIw8YnI+5Y+I4oigQeS4uuKWs0FCQ+S4reeahOinku+8jDxicj7iiLRBPTEyMMKwLiA8YnI+5pWF562U5qGI5Li677yaMTIwwrAuIA==

2/3单选题

难度：

2.在△ABC中，角A，B，C的对边分别为a，b，c，且A+C=2B若a=1，b＝

，则c的值为：（）

A	1
B	2
C	3
D	4

正确答案：Qg==

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

3/3单选题

难度：

3.满足条件

,

的

ABC的面积

的最大值是：（）

A
B
C
D

正确答案：Qw==

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