This equation shows how the money Morristown Middle School spends on workbooks is related to the total number of workbooks they
buy. d = 40t
The variable t represents the number of workbooks bought by the school, and the variable d represents the total cost of those workbooks. How much would it cost Morristown Middle School to buy a total of 2 workbooks?
If cos(70) = 0.342 the cosine of the alternative angle of 70° will also give the same value angle measure = 360 - 70 = 240° cos (240) will also be 0.342
