1/5单选题
难度：
1.如图，已知：45°＜∠A＜90°，则下列各式成立的是（ ）
| A | sinA=cosA |
| B | sinA＞cosA |
| C | sinA＞tanA |
| D | sinA＜cosA |
- 提示1：
- IOagueaNrumUkOinkuS4ieinkuWHveaVsOeahOWinuWHj+aAp3NpbkHpmo/op5LluqbnmoTlop7lpKfogIzlop7lpKfvvIxjb3NB6ZqP6KeS5bqm55qE5aKe5aSn6ICM5YeP5bCP77yM55u05o6l5b6X5Ye6562U5qGI5Y2z5Y+vLg==
正确答案：Qg==
6Kej77ya4oi1NDXCsO+8nEHvvJw5MMKw77yMPGJyPuKItOagueaNrnNpbjQ1wrA9Y29zNDXCsO+8jHNpbkHpmo/op5LluqbnmoTlop7lpKfogIzlop7lpKfvvIxjb3NB6ZqP6KeS5bqm55qE5aKe5aSn6ICM5YeP5bCP77yMPGJyPuW9k+KIoEHvvJ40NcKw5pe277yMc2luQe+8nmNvc0HvvIw8YnI+5pWF6YCJ77yaQi4g
2/5单选题
难度：
2.已知α为锐角，则m=sinα+cosα的值（ ）
| A | m＞1 |
| B | m=1 |
| C | m＜1 |
| D | m≥1 |
- 提示1：
- IOagueaNrumUkOinkuS4ieinkuWHveaVsOeahOamguW/te+8jOWPr+S7peeUqOebtOinkuS4ieinkuW9oueahOi+uei/m+ihjOihqOekuu+8jOWGjei/m+S4gOatpeagueaNruS4ieinkuW9oueahOS4iei+ueWFs+ezu+i/m+ihjOWIhuaekC4=
正确答案：QQ==
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
3/5单选题
难度：
3.已知α为锐角，且cosα的值小于
，那么α角的取值范围是（ ）
，那么α角的取值范围是（ ） | A | 60°＜α＜90° |
| B | 30°＜α＜90° |
| C | 0°＜α＜60° |
| D | 0°＜α＜30° |
- 提示1：
- IOagueaNrueJueauiuinkueahOS4ieinkuWHveaVsOWAvO+8jOS7peWPiuS9meW8puWHveaVsOmaj+inkuW6pueahOWinuWkp+iAjOWHj+Wwj+WNs+WPr+WIpOaWrS4=
正确答案：Qg==
6Kej77yaY29zzrE9PGltZyB3aWR0aD0xMiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zQy8wMi9yQkFDRTFOc0xET0RJWGpkQUFBQlV2LVo2bFkyMTgucG5nIj7vvIzliJnOsT0zMMKw77yMPGJyPuKIteS9meW8puWHveaVsOmaj+inkuW6pueahOWinuWkp+iAjOWHj+Wwj++8jOKItDMwwrDvvJzOse+8nDkwwrAuIDxicj7mlYXpgIlCLiA=
4/5单选题
难度：
4.已知a为锐角，下列结论：①sina+cosa=1；②如果a＞45°，那么sina＞cosa；③若cosa＞
，则a＜60°；④
＝1−sina. 其中正确的序号为（ ）
，则a＜60°；④＝1−sina. 其中正确的序号为（ ） | A | ①②③④ |
| B | ②③④ |
| C | ①③④ |
| D | ①②③ |
- 提示1：
- IOagueaNrumUkOinkuS4ieinkuWHveaVsOeahOWumuS5ieOAgeS6kuS9meinkueahOS4ieinkuWHveaVsOeahOWFs+ezu+OAgemUkOinkuS4ieinkuWHveaVsOeahOWinuWHj+aAp+OAgeeJueauiuinkueahOS4ieinkuWHveaVsOWAvOWPiue7neWvueWAvOeahOWumuS5ieaxguinoy4=
正确答案：Qg==
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
5/5单选题
难度：
5.sin70°，cos70°，tan70°的大小关系是（ ）
| A | tan70°＜cos70°＜sin70° |
| B | cos70°＜tan70°＜sin70° |
| C | sin70°＜cos70°＜tan70° |
| D | cos70°＜sin70°＜tan70° |
- 提示1：
- DQrpppblhYjmoLnmja7plJDop5LkuInop5Llh73mlbDnmoTmpoLlv7XvvIznn6XvvJpzaW43MMKw5ZKMY29zNzDCsOmDveWwj+S6jjHvvIx0YW43MMKw5aSn5LqOMe+8jOaVhXRhbjcwwrDmnIDlpKfvvJs=
- 提示2：
- DQrlj6rpnIDmr5TovoNzaW43MMKw5ZKMY29zNzDCsO+8jOWPiGNvczcwwrA9c2luMjDCsO+8jOWGjeagueaNruato+W8puWAvOmaj+edgOinkueahOWinuWkp+iAjOWinuWkp++8jOi/m+ihjOavlOi+gy4=
正确答案：RA==
6Kej77ya5qC55o2u6ZSQ6KeS5LiJ6KeS5Ye95pWw55qE5qaC5b+177yM55+lc2luNzDCsO+8nDHvvIxjb3M3MMKw77ycMe+8jHRhbjcwwrDvvJ4xLiA8YnI+5Y+IY29zNzDCsD1zaW4yMMKw77yM5q2j5bym5YC86ZqP552A6KeS55qE5aKe5aSn6ICM5aKe5aSn77yMPGJyPuKItHNpbjcwwrDvvJ5jb3M3MMKwPXNpbjIwwrAuIDxicj7mlYXpgIlELiA=