2 |
π |
4 |
1 |
2 |
1 |
1+a1 |
1 |
1+a2 |
1 |
1+an |
2tanα |
1-tan2α |
2(
| ||
1-(
|
π |
4 |
π |
4 |
1 |
an+1 |
1 | ||
|
1 |
an(1+an) |
1 |
an |
1 |
1+an |
1 |
2 |
1 |
1+an |
1 |
an |
1 |
an+1 |
1 |
1+a1 |
1 |
1+a2 |
1 |
1+an |
1 |
a1 |
1 |
a2 |
1 |
a2 |
1 |
a3 |
1 |
an |
1 |
an+1 |
1 |
a1 |
1 |
an+1 |
1 |
an+1 |
1 |
2 |
1 |
2 |
3 |
4 |
3 |
4 |
3 |
4 |
1 |
an+1 |
1 |
1+a1 |
1 |
1+a2 |
1 |
1+an |
|
9 |
8 |
| ||
8 |
3 |
7 |
5 |
A.a<b | B.a=b | C.a>b | D.不确定 |
A.a2<b2 | B.
| C.
| D.
|
π |
2 |
A.sinx<
| B.sinx>
| C.sinx<
| D.sinx>
|
1 |
a |
1 |
b |
b |
a |
a |
b |
a2 |
b |
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