Express the sum or difference as a product of sines and/or cosines.cos 
+ cos 
A. 2 sin (2?) sin 
B. 2 cos (2?) cos 
C. 2 cos (2?)
D. 2 sin (2?) sin ?
Answer: B
You might also like to view...
Anne wants to accumulate $25,000 by December 31, 2019. To accumulate that sum, she will make twelve equal quarterly deposits of $1,616.66 at the end of March, June, September, and December, beginning on March 31, 2016, into a fund that earns interest compounded quarterly. What annual rate of interest must the fund provide to yield the desired sum?
A. ?4.5% B. ?6.5% C. ?18% D. ?26%
Solve the equation for the unknown quantity.5x + 5 = 4x + 14
A. 11
B. 
C. 1
D. 9
Solve the problem.If tan ? = 
, and ? terminates in quadrant III, then find cos 2?.
A. 
B. 
C. - 
D. - 
Beginning December 31, 2014, ten equal, annual withdrawals are to be made. ? Required: ? Using the appropriate tables, determine the equal, annual withdrawals if $140,000 is invested on January 1, 2014 at an interest rate of 10% compounded annually.
What will be an ideal response?