4.
如图,在△ABC中,AB=AC,以AC为直径的⊙O交与点M,交BC于点N,连接AN,过点C的切线交AB的延长线于点P.
(1)求证:∠BCD=∠BAN.
(2)若AC=4,PC=3,求MN•BC的值.
(1)求证:∠BCD=∠BAN.
(2)若AC=4,PC=3,求MN•BC的值.
1.在平面直角坐标系中,一条直线经过第三象限内A、B两点,过A、B分别作两坐标轴的垂线与两坐标轴围成的矩形周长均为10,则该直线的函数表达式为( )
0 298010 298018 298024 298028 298034 298036 298040 298046 298048 298054 298060 298064 298066 298070 298076 298078 298084 298088 298090 298094 298096 298100 298102 298104 298105 298106 298108 298109 298110 298112 298114 298118 298120 298124 298126 298130 298136 298138 298144 298148 298150 298154 298160 298166 298168 298174 298178 298180 298186 298190 298196 298204 366461
| A. | y=x-5 | B. | y=x-10 | C. | y=-x-5 | D. | y=-x-10 |