Question
Sat March 12, 2011 By: Garima Srivastava

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

Expert Reply
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.
Ask the Expert