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A right triangle with angles 61 degrees, and 29 degrees. The hypotenuse is 42. The leg opposite the 61 degree angle is, y.Eugene wants to use the cosine ratio to calculate for the triangle below. 

  1. Which angle should he use to write an equation and solve for using the cosine ratio? Why?

    The side labeled  is adjacent (next to) which angle?

  2. Set up an equation, and solve for using cosine.