|
1 |
10 |
sin(π-α)cos(-α)cos(
| ||
cos(
|
A.3 | B.2 | C.1 | D.0 |
1 |
2 |
1 |
10 |
sin(π-α)cos(-α)cos(
| ||
cos(
|
sinαcosα(-sinα) |
-sinα[-(-sinα)] |
a |
b |
a |
b |
A.② | B.①② | C.①④ | D.②③ |
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
x2 |
25 |
y2 |
9 |
x2 |
35 |
A.p∨(-q) | B.p∧q | C.(-p)∧(-q) | D.(-p)∨(-q) |
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