Answer:
just write the expression
Step-by-step explanation:
if its for math but then i dont know
Answer:
x=51
Explanation:
the total interior degrees of a triangle are 180°
![\cos(2x) = \cos(x)](https://tex.z-dn.net/?f=%20%5Ccos%282x%29%20%20%3D%20%20%5Ccos%28x%29%20)
Solution (1)
![2x = x + 2k\pi](https://tex.z-dn.net/?f=2x%20%3D%20x%20%2B%202k%5Cpi)
![2x - x = 2k\pi](https://tex.z-dn.net/?f=2x%20-%20x%20%3D%202k%5Cpi)
![x = 2k\pi](https://tex.z-dn.net/?f=x%20%3D%202k%5Cpi)
for k=0 / for k=1 / for k=-1
x=0 / x=2π / x=-2π
acc / acc / rej
solution (2)
![2x = - x + 2k\pi](https://tex.z-dn.net/?f=2x%20%3D%20%20-%20x%20%20%2B%202k%5Cpi)
![2x + x = 2k\pi](https://tex.z-dn.net/?f=2x%20%2B%20x%20%3D%202k%5Cpi)
![3x = 2k\pi](https://tex.z-dn.net/?f=3x%20%3D%202k%5Cpi)
![x = \frac{2k\pi}{3}](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B2k%5Cpi%7D%7B3%7D%20)
for k=0 / for k=1 / for k=-1
x=0 / x=2π/3 / x=-2π/3
acc / acc / rej
Note that i'm trying values of K which make the answer belong to our interval;
So our solution which i will represent as a set is;
S € {0,2π/3,2π}
Answer:
Step-by-step explanation: