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设直角△ABC的三边分别为a,b,c,其中c为斜边,直线ax+by+c=0与圆c...
设直角△ABC的三边分别为a,b,c,其中c为斜边,直线ax+by+c=0与圆cos
2θ•x
2+cos
2θ•y
2=1,θ为常数,θ∈(0,
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)交于M、N两点,则|MN|=( )
A.sinθ
B.2sinθ
C.tanθ
D.2tanθ
考点分析:
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