Find all degree solutions for the following: Cos 4x = -1

[From: ] [author: ] [Date: 12-04-09] [Hit: ]

Find all degree solutions for the following

Assuming you mean cos(4x) = -1,
cos(4x) = -1
4x = 180 + 360n for all integers, n
x = 45 + 90n for all integers, n

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