BP |
PC |
PA |
PQ |
BC |
A.(6,-21) | B.(2,-7) | C.(-2,-7) | D.(-6,21) |
PC |
PQ |
1 |
2 |
PA |
PC |
PA |
PQ |
|
PC |
BP |
PC |
BC |
BP |
PC |
MA |
MB |
MC |
0 |
CA |
CB |
CM |
A.2 | B.3 | C.4 | D.5 |
a |
b |
a |
b |
c |
a |
b |
c |
a |
c |
b |
c |
a |
b |
a |
c |
a |
b |
a |
b |
π |
4 |
A.3 | B.-3 | C.
| D.-
|
a |
b |
a |
b |
4sinα-2cosα |
5cosα+3sinα |
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