Find the unknown side lengths labeled with a variable in the given pair of similar triangles. B a= 9 15 A 12 C o 15 P b a (Simplify your answer. Type a whole number.) b= (Simplify your answer. Type a whole number.) R

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Q: What is the range of the function f(x) = 2 cos x + 1? [0,3] O[-2,2] O[-2, 1] O[-3,0] O[-1,3]

A: f(x)=2cosx+1