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△ABC内接于以O为圆心,1为半径的圆,且,则的值为A.B.C.D.
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△ABC内接于以O为圆心,1为半径的圆,且
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIsAAAAWCAYAAADw4W9iAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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==
)
,则
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADUAAAAWCAYAAABg3tToAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
的值为( )
A.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAjCAYAAACdHYpiAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAL9JREFU
SEvtVMENwyAMJCt7HW/iOZiCJVzjlMSoIhjIo1VjCfHycWfOt7FUWKkMsFJhpVnZuwESMQRgSnWH
DyBinpOcWQB9NDI+AD89AzVR9sF+MJ5m8hnpwq5fABDx1FY0HrcV25DRlfABaoY5ts6zDHp50ZVw
G0AiOIwUgLgEk5OBhIlpsqx8ABJprR91ACQmKF5BCbaZUH337Karg9XBoH5Rh2n0DANoOo//gmUh
ACsMIo7O4CKN/m2ZWlv5AgqRBveuBYv4AAAAAElFTkSuQmCC
)
B.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAJhJREFU
OE/dk90NwCAIhOnKrMMmzOEULkH9qVYrEps2fSiJMTEnXo7PTUKBVVFgFawLPAsCCvv+Su7gKPoI
aybIKqGfC1JIMYe8yJ1h3Yh6MpQXOhRj2p5gWufhsUnPWIMCZClgHR4CLM1h+1pFro33IvDCWOZA
ATwN2uPM0QjukEMy27ynBNUb1gVWB0f95wExaPp6WDMudiIX3/atDCZcAAAAAElFTkSuQmCC
)
C.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAjCAYAAACdHYpiAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAPdJREFU
SEvNlcERxCAIRd2WbYdOrMMqbIJgwEQTHVBndteLXnjyP6AfpOV2VgbsLLcTfGY/BUgBvXMk2WNI
HGkGpOCbwHKxDRCBggFjJ10DIGHwDgEyJKdP54qkA+R2iBz1lKICzgAfUDwjRESoslgAsCQvZVAB
+DJQPBEfdAAln290xbkMrCQZANk61s1VaMtpBIz79Q8AEYq2zl633ECFKqG0b2+fmsaRjWoG2nvx
PQBPoRi91InNRN7CbBKo/0cVNQBkmDpzMF1Gbrr7RZ4GXE9apccg4dkJNNrzVaghBNjJIMKsB9d3
9v4Tlkx8OrJgYov4PeAAeT3t7xc1uEEAAAAASUVORK5CYII=
)
D.
相关试题
-
已知△ABC内接于以O为圆心,以1为半径的圆,且
,
(Ⅰ)求数量积![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADYAAAAWCAYAAACL6W/rAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(Ⅱ)求△ABC面积.
-
△ABC内接于以O为圆心,半径为1的圆,且
,则△ABC的面积为( )
A.1
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAMpJREFU
OE+9k9ENBCEIRLmWaYdOrIMqbIKTBRUNZ/zYHMlmEzLCCM+PtIBTqOAUcC2oBbWVfVik+kmvwEIh
GauagEmI82ZNUKWglwaSXbeYZFIhSukGdAR74cds6JdcczWcC04VmHYPtQj2AbX/ft37Uf/ayQsV
xgaD0Z57YLrm4SWTY2hzmsODIbeOeZpsREECiwuMKCIVGVlxH6A86mlig21vBU9iIboBE6okAmuJ
DuZoMWl2T56Y2Hdn6il9WWNZ69v4+7KSnX8BdZjG/T/cGcgAAAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAMdJREFU
OE+9U8ERAyEIJC3TDp1YB1XYBMFDESPnzE0y8XM3urLLLr5EF5xWA5wWPAPUIgiglCil2lWvUAsu
B6OyAZj0kIQTPgVUKQhC1ECtvP4HJIzbxLb7SQXXBhatMxYLhSoJwCixt+EUk7Zr6hsuEoay1lGg
7D4Yr3WxtvvQ6tyob9Mc9mbfJc07oh92YSl2s1Inl0SnIp+oOCRR8AwryWFrk2md6NSHS2zgS3zQ
6PcuoiwFnCowzVdlGvy57W/i32HdzcMbJ0DG/RVObD4AAAAASUVORK5CYII=
)
D.
-
△ABC内接于以O为圆心,半径为1的圆,且
,则△ABC的面积为( )
A.1
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAMpJREFU
OE+9k9ENBCEIRLmWaYdOrIMqbIKTBRUNZ/zYHMlmEzLCCM+PtIBTqOAUcC2oBbWVfVik+kmvwEIh
GauagEmI82ZNUKWglwaSXbeYZFIhSukGdAR74cds6JdcczWcC04VmHYPtQj2AbX/ft37Uf/ayQsV
xgaD0Z57YLrm4SWTY2hzmsODIbeOeZpsREECiwuMKCIVGVlxH6A86mlig21vBU9iIboBE6okAmuJ
DuZoMWl2T56Y2Hdn6il9WWNZ69v4+7KSnX8BdZjG/T/cGcgAAAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAMdJREFU
OE+9U8ERAyEIJC3TDp1YB1XYBMFDESPnzE0y8XM3urLLLr5EF5xWA5wWPAPUIgiglCil2lWvUAsu
B6OyAZj0kIQTPgVUKQhC1ECtvP4HJIzbxLb7SQXXBhatMxYLhSoJwCixt+EUk7Zr6hsuEoay1lGg
7D4Yr3WxtvvQ6tyob9Mc9mbfJc07oh92YSl2s1Inl0SnIp+oOCRR8AwryWFrk2md6NSHS2zgS3zQ
6PcuoiwFnCowzVdlGvy57W/i32HdzcMbJ0DG/RVObD4AAAAASUVORK5CYII=
)
D.
-
△ABC内接于以O为圆心半径为1的圆,且
,则△ABC的面积S=________.
-
△ABC内接于以O为圆心半径为1的圆,且
,则△ABC的面积S=________.
-
△ABC内接于以O为圆心半径为1的圆,且
,则△ABC的面积S=________.
-
△ABC内接于以O为圆心半径为1的圆,且
,则△ABC的面积S=________.
-
△ABC内接于以O为圆心半径为1的圆,且
,则△ABC的面积S=________.
-
△ABC内接于以O为圆心半径为1的圆,且
,则△ABC的面积S=________.
-
△ABC内接于以O为圆心半径为1的圆,且
,则△ABC的面积S=________.