What is the limit as x approaches 9 of cos((pix)/3) ?

The limit as x approaches 9 of cos((pix)/3) is -1

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limit as x approaches 9 of cos((pix)/3)

x \to 9 lim (cos (\frac{π x}{3}))

- 1

Solution steps

x \to 9 lim (cos (\frac{π x}{3}))

Plug in the value

x = 9

= cos (\frac{π 9}{3})

Simplify

cos (\frac{π 9}{3}) : - 1

= - 1

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What is the limit as x approaches 9 of cos((pix)/3) ?
The limit as x approaches 9 of cos((pix)/3) is -1