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4 |
y2 |
3 |
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PB |
PC |
PD |
EA |
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PA |
PB |
PC |
PD |
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EB |
PA |
PE |
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PB |
PE |
EB |
PA |
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PE |
EA |
PE |
EB |
PE |
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EA |
EB |
EA |
EB |
PE |
PE |
PC |
PD |
PF |
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PB |
PC |
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x2 |
4 |
y2 |
3 |
a2 |
4 |
b2 |
3 |
a2 |
4 |
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PC |
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x2 |
4 |
y2 |
3 |
sinA+sinC |
sinB |
A、
| ||||
B、
| ||||
C、4 | ||||
D、2 |
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x2 |
4 |
y2 |
3 |
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x2 |
4 |
y2 |
3 |
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x2 |
4 |
y2 |
3 |
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