2.诱导公式:用
填空
|
角x |
Sinx |
Cosx |
Tanx |
角x |
Sinx |
Cosx |
Tanx |
|
π-α |
|
|
|
|
|
|
|
|
π+α |
|
|
|
|
|
|
|
|
-α |
|
|
|
|
|
|
|
|
2π-α |
|
|
|
|
|
|
|
|
口诀 |
|