What is the domain and range of y=arccos(x48)?

1 Answer
Aug 24, 2016

Domain=[4,12], and,

Range=[0,π].

Explanation:

Let us recall the Defn. of arccos function :

arccost=θ,|t|1,cosθ=t,θ[0,π]

Hence, the Domain for the given function, is, given by,

x481|x4|848x4+8, i.e.,

4x12,or,x[4,12]

The Range is y[0,π]