(1+cos2α)cos(
| ||
2cos(π+α) |
7π |
12 |
(cos2A+1)cos(
| ||
2cos(π+A) |
cos2AsinA |
cosA |
1 |
2 |
1 |
2 |
| ||
2 |
π |
4 |
1 |
2 |
π |
2 |
5π |
4 |
π |
4 |
9π |
4 |
π |
4 |
3π |
2 |
1-
| ||
2 |
| ||
2 |
π |
4 |
1 |
2 |
π |
4 |
| ||
2 |
π |
4 |
π |
4 |
5 |
4 |
π |
4 |
3π |
4 |
π |
4 |
7π |
12 |
π |
3 |
5π |
12 |
BC |
sinA |
AC |
sinB |
BCsinB |
sinA |
6 |
m |
n |
m |
n |
7 |
π |
6 |
31 |
32 |
π |
2 |
1 | ||
|
3 | ||
|
A.
| B.
| C.
| D.2kπ+
|
sin3a |
sina |
13 |
5 |
a |
b |
b |
a |
tanC |
tanA |
tanC |
tanB |
© 2017-2019 超级试练试题库,All Rights Reserved.