a |
b |
a |
b |
x |
3 |
a |
b |
y |
a |
3 |
b |
x |
y |
a |
b |
a |
b |
a |
b |
3π |
2 |
π |
3 |
π |
3 |
a |
| ||
2 |
1 |
2 |
b |
1 |
2 |
| ||
2 |
a |
b |
a |
b |
x |
y |
3 |
a |
b |
a |
3 |
b |
3 |
a |
a |
b |
3 |
b |
3 |
x |
(2
|
b |
(2
|
x |
y |
| ||||
|
|
8
| ||
4×4 |
| ||
2 |
x |
y |
| ||
2 |
π |
6 |
π |
6 |
cosB |
sinC |
AB |
cosC |
sinB |
AC |
AO |
2π |
3 |
B |
2 |
| ||
2 |
3 |
cos(
| ||||
cos(
|
A.tan
| B.tan2x | C.-tanx | D.cotx |
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