Module 5: Lesson 4

 

Self-Check 2

2. Questions 4.b., 4.d., 5.a., 5.d., and 12 on page 306 of the textbook
   
   4.  

      2. The expression (6 cos2 24° − 6 sin2 24°) tan 48° can be rearranged into one trigonometric function by using the following steps:
         
         

          

         

      4. Using the identity cos 2A = 2 cos2 A − 1, this equation can be solved as follows:
         
         

          
         
         
   5.  
      1. 
      4. 
   12.  
       1. The equation can be verified by substituting  into the equation as follows:
          
          
           
          
       2. 

       3. The expression  can be rearranged to the form  as follows:
          
          

           
          

© 2012 Alberta Education