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Find the period of f(x)=cos ((4x+9)/(5))...

Find the period of `f(x)=cos ((4x+9)/(5))`

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The correct Answer is:
`5pi//2`
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SRISIRI PUBLICATION-IPE SCANNER (TEXUAL BITS)-Very Short Questions (2 marks) (Trigonometric Ratios, Transformations)
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  3. Find the period of f(x)=cos ((4x+9)/(5))

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