What is the critical cos(x) ?

The critical cos(x) is x=2pin,x=pi+2pin

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critical cos(x)

critical points

cos (x)

x = 2 πn, x = π + 2 πn

Solution steps

cos (x)

Find where

f^{'} (x)

is equal to zero or undefined

x = 2 πn, x = π + 2 πn

Identify critical points not in

f (x)

domain

Domain of

cos (x) : - \infty < x < \infty

All critical points are in domain

x = 2 πn, x = π + 2 πn

f (x) = 11 x + 12 y = 8

f (x) = \frac{x + 1}{2 x - 4}

(500, 1), (700, 0)

m = \frac{3}{4}, (- 5, 8)

f (x) = \frac{- 6 x}{x ^{2} + 5}