Cho mình hỏi sao từ dòng ĐK suy ra -cos2x được ạ ?
...
![subject](/tpl/images/cats/mat.png)
Mathematics, 22.07.2021 17:40 Lamr
Cho mình hỏi sao từ dòng ĐK suy ra -cos2x được ạ ?
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Mathematics
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 14:30, theworld58
Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?
Answers: 1
![image](/tpl/images/cats/mat.png)
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 20:50, jahootey2798
You need to solve a system of equations. you decide to use the elimination method. which of these is not allowed? 3x - 2y = 7 3x + 4y = 17 equation 1 equation 2
Answers: 1
You know the right answer?
Questions in other subjects:
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/ekonomika.png)
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/geografiya.png)
![Konu](/tpl/images/cats/istoriya.png)
History, 20.05.2021 19:00
![Konu](/tpl/images/cats/istoriya.png)
History, 20.05.2021 19:00
![Konu](/tpl/images/cats/mat.png)
Mathematics, 20.05.2021 19:00
![Konu](/tpl/images/cats/mat.png)
Mathematics, 20.05.2021 19:00