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Question
Sat March 12, 2011

# please give The general solution of 2cos 2x + 1 = 0

Sat March 19, 2011
Dear Student,

Here is the solution:

2 Cos 2X + 1 = 0

Re-arrange the equation:

Cos 2X = - 1 / 2

Therefore 2X = 120o and 240o which gives:

X = 60o and X = 120o.

Hope this helps.
Regards
Team Topperlearning.
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