What is the periodicity of f(x)=-cos((6x)/7) ?

The periodicity of f(x)=-cos((6x)/7) is (7pi)/3

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periodicity of f(x)=-cos((6x)/7)

periodicity

\frac{7 π}{3}

Decimal

7.33038 \dots

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{6}{7}}

Simplify

= \frac{7 π}{3}

What is the periodicity of f(x)=-cos((6x)/7) ?
The periodicity of f(x)=-cos((6x)/7) is (7pi)/3