Domain are all the possible x values of a function. When you look at a cosine graph you can see that it goes on into infinity in the x or horizontal direction. This means that all x values are included in cosine. Because of this the domain is:
all real numbers
or
(-∞,∞)
^^^ It can be written both ways
Hope this helped! Let me know if there is anything else I can do!
Answer:
x=-1
Step-by-step explanation:
![\frac{x ^{100} + 1 }{x + 1}](https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%20%5E%7B100%7D%20%2B%201%20%7D%7Bx%20%2B%201%7D%20)
![x + 1 = 0](https://tex.z-dn.net/?f=x%20%2B%201%20%3D%200)
![x = - 1](https://tex.z-dn.net/?f=x%20%3D%20%20-%201)
Answer:
sim eu também preciso desta respota
Length of x is 98.2 m
<u>Step-by-step explanation:</u>
Step 1:
Use the trigonometric ratio tan 27° to find the common side of both the right angled triangles.
tan 27° = opposite side/adjacent side = opposite side/9
∴ Opposite side = 9 tan 27° = 9 × - 3.27 = -29.46 m
Step 2:
Use this side and trigonometric ratio cosine to find the value of x.
cos 49° = adjacent side/x = -29.46/x
∴ x = -29.46/cos 49° = -29.46/0.30
= 98.2 m (negative value neglected)