Verified Answer :

caylus

Hello,

-1<=cos x <=1
==>-10<=10*cos x <=10
max y=10 if x=0 +2kπ ==>x=0,-2π,2π
min y=-10 if x=π+2kπ ==>x=-π,π

Answer:

The max. is 10 and minimum is -10

Step-by-step explanation:

Based on the critical points and what it equals at 0

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