Answer: The mean is 6.
Step-by-step explanation: First you add all of the numbers together getting a total of 48. Next to find the mean you divide them by the total number of "dots". Lastly, you get the answer of 6 which is your mean.
-16+x=-5
-16 is the opposite of 16
X is the unknown number( variable)
-5 is the result
Using the identity:
, we get:
There are two solutions to this equation:
1) 
Since the period of cosine is 2π, so 0 + 2π = 2π will also be a solution to the given equation
2) 
Therefore, there are 3 solutions to the given trigonometric equation.
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