Assessment #3

What is this video about?
          This video is about solving trigonometric equations, using the power-reducing formulas. In thie videowe will be using basic algebraic processes and substitution to finalize our answer.

What does the viewer need to pay closer attention to when solving the problem? 
          The viewer must pay attention to breaking down cos^4x, in order to make it possible to substitute the power-reducing formula. Also, the viewer must pay attention to the substitution of 'm' for 2x.