Practice with
Angle Sum, Difference, Double and Half Angle Formulas
 Topic Index | Algebra2/Trig Index | Regents Exam Prep Center


Solve the following problems using the sum, difference, double and half angle formulas.
Unless otherwise stated, an exact answer is expected.

1.


Answer

 

 

2.
  


Answer

 

 

3.

   


Answer

 

 

4.  
  


Answer

 

 

5.  

    


  Answer

 

 

6.  

  


Answer



 

7. Is the following problem solved correctly?  If not, correct the error(s).

 Find sin(105º).
Solution (????):
                      


Answer

 

 

8.   

     


Answer