Answer:

Step-by-step explanation:
Domain of a cosine is all real numbers.
Therefore the domain of F(x) = 2cos(3x - 1) is the set of all real numbers.
Answer:
0.108³
Step-by-step explanation:
21023÷122³=0.011577...
cube root of 0.11577 = 0.1075988..
therefore, ans = 0.108³
Answer:
Step-by-step explanation:
We can easily determine the exact value of this unknown angle by breaking it into known angles that can add together to give up 105. For example, 105 degrees is 60 + 45, both of which are found on the unit circle. We ill also use the trig identity for the sum of the cos of 2 angles which is:
These values are found on the units circle, so make sure you have one handy. Those values fill in as follows:
which simplifies to

Answer: 31
I hope this helps and have a great day!
I would assume that they want a cosine value that would give the same answer. sin(30°) is equal to 1/2
Therefore cos(×) = 1/2
x = arccos(1/2)
x=60
cos(60°)