What is the periodicity of y= 8/9 cos((pix)/4) ?

The periodicity of y= 8/9 cos((pix)/4) is 8

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periodicity of y= 8/9 cos((pix)/4)

periodicity

y = \frac{8}{9} cos (\frac{π x}{4})

8

Solution steps

Periodicity of

a \cdot cos (b x + c) + d = \frac{periodicity of cos ( x )}{∣ b ∣}

Periodicity of

cos (x)

2 π

= \frac{2 π}{\frac{π}{4}}

Simplify

= 8

(1, 2), (3, 4)

f (x) = 3 x^{3} + 4 x

(2, - 1), (7, 3)

f (x) = x + 2

f (x) = - 3 - 2 x

What is the periodicity of y= 8/9 cos((pix)/4) ?
The periodicity of y= 8/9 cos((pix)/4) is 8