What is the limit as x approaches pi/4 of cos(2x) ?

The limit as x approaches pi/4 of cos(2x) is 0

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limit as x approaches pi/4 of cos(2x)

x \to \frac{π}{4} lim (cos (2 x))

0

Solution steps

x \to \frac{π}{4} lim (cos (2 x))

Plug in the value

x = \frac{π}{4}

= cos (2 \cdot \frac{π}{4})

Simplify

cos (2 \cdot \frac{π}{4}) : 0

= 0

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What is the limit as x approaches pi/4 of cos(2x) ?
The limit as x approaches pi/4 of cos(2x) is 0