The leaves being brown are an indication the leaves have been affected by the frost/cold temps. Unless the heart of the plant was hard frozen, there is a very good chance it will come back and put out new leaves when the weather warms up.
We used to cover ours....14 years ago....now too tall to reach.....still going strong after 14 years and some pretty cold temps over the years.
Cut off the dead fronds and hope for the best.
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