
f´(x)=

f´(x)= 0 for cos x =0
f´(x) have
two zeroes on the closed interval [ 0,2π].
x=π/2 and
x=3π/2
Answer:
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Step-by-step explanation:
It would be on a positive incline and pass through the points (0,-5), (1, -2), and (4,3)