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

Asked by GARIMA SRIVASTAVA | 12th Mar, 2011, 04:28: AM

Expert Answer:

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.

Answered by  | 19th Mar, 2011, 07:12: PM

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