SOLUTION: Hello, Identify the domain and range of f(x)= 2cosx

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Question 898231: Hello,
Identify the domain and range of
f(x)= 2cosx


Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Domain: There are no values of x for which f(x) is not defined so (-infinity,infinity).
Range : The cosine function travels between [-1,1] so multiplying by the constant, [-2,2] is the range.