What is the periodicity of f(x)=4cos((8pix)/7) ?

The periodicity of f(x)=4cos((8pix)/7) is 7/4

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periodicity of f(x)=4cos((8pix)/7)

periodicity

\frac{7}{4}

Decimal

1.75

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{8 π}{7}}

Simplify

= \frac{7}{4}

What is the periodicity of f(x)=4cos((8pix)/7) ?
The periodicity of f(x)=4cos((8pix)/7) is 7/4