Use identities to fill in the blank with the appropriate trigonometric function name.
\[
\cos 35^{\circ}=\frac{1}{55^{\circ}}
\]
\[
\cos 35^{\circ}=\frac{1}{\square 55^{\circ}}
\]

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Final Answer: The appropriate trigonometric function to fill in the blank is \(\boxed{\sec}\)

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Step 1 ：Use identities to fill in the blank with the appropriate trigonometric function name. \[\cos 35^{\circ}=\frac{1}{55^{\circ}}\] \[\cos 35^{\circ}=\frac{1}{\square 55^{\circ}}\]

Step 2 ：Final Answer: The appropriate trigonometric function to fill in the blank is \(\boxed{\sec}\)

Use identities to fill in the blank with the appropriate trigonometric function name.\[\cos 35^{\circ}=\frac{1}{55^{\circ}}\]\[\cos 35^{\circ}=\frac{1}{\square 55^{\circ}}\]

Answer

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Use identities to fill in the blank with the appropriate trigonometric function name.
\[
\cos 35^{\circ}=\frac{1}{55^{\circ}}
\]
\[
\cos 35^{\circ}=\frac{1}{\square 55^{\circ}}
\]