圆x2+y2-2axsina-2bycosa-a2•cos2a=0(a>0,b>0)在x轴上截得的弦长是____.
圆x2+y2-2axsina-2bycosa-a2•cos2a=0(a>0,b>0)在x轴上截得的弦长是____.
【正确答案】:2a.
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