sin(7π/6-a)
=sin(π+π/6-a)
=-sin(π/6-a)
=-根号3/3
若sin(π/6-a)=根号3/3,则sin(7π/6-a)=
若sin(π/6-a)=根号3/3,则sin(7π/6-a)=
数学人气:245 ℃时间:2020-05-27 02:48:21
优质解答
我来回答
类似推荐
猜你喜欢
- 1请问 X(X-2)=24 如何解方程啊.
- 2we couldn't eat in the restaurant because _____of us had _____on us.A.all,no B.any,no C.none,
- 3A large amount of money is spent on advertisements every year.
- 4水光潋滟晴方好,山色空蒙雨亦奇.是描写哪个风景名胜?
- 5介词above和over有何区别?
- 6[(x+c)/(ax^2-bx)]dx怎么积分呢?
- 7反义词容易一()粗糙一()
- 8近似数0.004320的有效数字有几个?
- 9Do you enjoy r------ storybooks.
- 10英语翻译下面的短文