1. 难度:中等 | |
(2016新课标全国I文)的内角A、B、C的对边分别为a、b、c.已知,,,则b= A. B. C.2 D.3
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2. 难度:中等 | |
(2016天津)在中,若,BC=3,,则AC= A.1 B.2 C.3 D.4
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3. 难度:中等 | |
(2016新课标全国III理)在中,,BC边上的高等于,则 A. B. C. D.
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4. 难度:中等 | |
(2016山东)中,角A,B,C的对边分别是a,b,c,已知,则A= A. B. C. D.
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5. 难度:中等 | |
(2013天津)在中,∠ABC=,AB=,BC=3,则sin∠BAC= A. B. C. D.
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6. 难度:中等 | |
(2016上海)已知的三边长分别为3,5,7,则该三角形的外接圆半径等于_________.
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7. 难度:中等 | |
(2017浙江)已知向量a,b满足,,则的最小值是________,最大值是_______.
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