Solve the equation 2 cos^2 x + cos x - 1 = 0

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In this video, we will learn to solve the equation “2 cos^2 x + cos x - 1 = 0”. The equation “2 cos^2 x + cos x - 1 = 0” is the twenty fifth question of 2.3 section of the book “Trigonometry by Ron Larson”.

Following link of the video explains the proof of the identity cos(-x) = cos x

Other topics of this video:
Solve 2 cos^2 x + cos x - 1 = 0
Find values of x when 2 cos^2 x + cos x - 1 = 0
How to solve 2 cos^2 x + cos x - 1 = 0?

I, Ravi Ranjan Kumar Singh, have produced this video. All credits of this video belong to me.

  1. Ravi Ranjan Kumar Singh
  2. 2 cos^2 x cos x - 1 = 0
  3. Solve the equation 2 cos^2 x cos x - 1 = 0
  4. Solve 2 cos^2 x cos x - 1 = 0
  5. Find values of x when 2 cos^2 x cos x - 1 = 0
  6. How to solve 2 cos^2 x cos x - 1 = 0?
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