本课配套习题挑战模式1/4
单选题
难度系数:
1.在三角形ABC中,分别为内角A,B,C所对的边,若b=3,c=,A=30°,则角C等于( )
A: 30° |
B: 120° |
C: 60° |
D: 150° |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruS9meW8puWumueQhuaxguWHuui+uemVv2HnmoTlgLw=
- 提示2:IOWGjeagueaNruS9meW8puWumueQhjxpbWcgd2lkdGg9OTQgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDQvOUMvckJBQ0psUkEwZHJnMEhMTEFBQUNtX3BDSWUwMzM1LnBuZyI+77yM5rGC5Ye6PGltZyB3aWR0aD0yNyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zNy80Mi9yQkFDRTFSQTBkcUQ4OUVpQUFBQmJ0aEIzMXMxMDUucG5nIj7vvIzov5vogIzmsYLlh7rop5JD55qE5bqm5pWw
- 答案:Qg==
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本课配套习题挑战模式2/4
单选题
难度系数:
2.已知△ABC中,AB=2,AC=3,BC=4,则角A,B,C中最大角的余弦值为( )
A: |
B: |
C: |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:IOW3suefpeS4iei+uemVv++8jOagueaNruWkp+i+ueWvueWkp+inku+8jOWwj+i+ueWvueWwj+inkueahOWOn+WIme+8jOaJvuWHuuacgOWkp+inku+8jOeEtuWQjueUqOS9meW8puWumueQhuaxguWHuuacgOWkp+inkueahOS9meW8puWAvA==
- 答案:QQ==
6Kej5p6Q77ya5qC55o2u6aKY5oSP77yMPGltZyB3aWR0aD04NyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC80QS8wRC9yQkFDRkZSQTBlU0Nia2VKQUFBQjlnUktIY2s4NDIucG5nIj7vvIzmoLnmja7lpKfovrnlr7nlpKfop5LvvIzlsI/ovrnlr7nlsI/op5LvvIzmnIDlpKfop5LkuLriiKBB77yM5bey55+lQUI9Mu+8jEFDPTPvvIxCQz0077yM5omA5LulPGltZyB3aWR0aD0yMTAgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDQvOUMvckJBQ0psUkEwZVNqbDg1T0FBQUVBMmp6dW9VMjU4LnBuZyI+44CC5pWF6YCJQQ==
本课配套习题挑战模式3/4
单选题
难度系数:
3.在三角形ABC中,已知三边,满足,则c=()
A: 15° |
B: 30° |
C: 45° |
D: 60° |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWMlueugDxpbWcgd2lkdGg9MTcyIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzM3LzQyL3JCQUNFMVJBMGV1amdQcERBQUFDbS1Ra3lGUTQyMy5wbmciPg==
- 提示2:IOaKiuWMlueugOeahOe7k+aenOS7o+WFpeS9meW8puWumueQhueahOWFrOW8j+S4re+8jOaxguWHujxpbWcgd2lkdGg9MjcgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMzcvNDIvckJBQ0UxUkEwZHFEODlFaUFBQUJidGhCMzFzMTA1LnBuZyI+77yM6L+b6ICM5b6X5YiwQ+eahOW6puaVsOOAgg==
- 答案:RA==
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
本课配套习题挑战模式4/4
单选题
难度系数:
4.在△ABC中,B=60°,,则△ABC是()
A: 锐角三角形 |
B: 钝角三角形 |
C: 等腰三角形 |
D: 等边三角形 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruS9meW8puWumueQhjxpbWcgd2lkdGg9OTUgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNEEvMEUvckJBQ0ZGUkEwZlhBblRTRUFBQUNsMmhsWTg4MTE3LnBuZyI+5b6X5Ye6YeS4jmPnmoTlhbPns7vvvIzov5vogIzlvpflh7pB44CBQ+eahOW6puaVsO+8jOeEtuWQjuWIpOaWreWug+eahOW9oueKtg==
- 答案:RA==
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