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如图,AE是⊙O的切线,切点为A,BC∥AE,BD平分∠ABC交AE于点D,交AC于点F
1.求证:AC=AD;
2.若BC=,FC=,求AB长.
如图,AE是⊙O的切线,切点为A,BC∥AE,BD平分∠ABC交AE于点D,交AC于点F【小题1】求证:AC=AD;【小题2】若BC=,FC=,求AB长.