Verify that the equation is an identity.cos
= 
cos x - 
sin x
What will be an ideal response?
cos 
= cos x cos 
- sin x sin 
= 
cos x - 
sin x.
You might also like to view...
Solve.A baseball manager has 10 players of the same ability. How many 9-player starting lineups can he create?
A. 90 B. 3,628,800 C. 362,880 D. 10
Solve the problem.Jane wants to buy a photocopier. The salesman has the following information on 3 models. If all 3 are used, a specific job can be done in 50 minutes. If copier A operates for 20 minutes and copier B for 50 minutes, one-half the job is finished. If copier B operates for 30 minutes and copier C for 80 minutes, three-fifths of the job is done. Which is the fastest copier, and how long does it take for this copier to finish the whole job?
A. B is fastest; 100 min B. C is fastest; 120 min C. C is fastest; 100 min D. A is fastest; 120 min
Write the number as indicated.The world-wide production of cereal grains has reached about one billion, seven hundred 
million, four hundred three thousand, three hundred tons. Write the number using digits.
A. 1,761,430,300 B. 1,761,403,300 C. 1,761,403,030 D. 1,761,343,300
Solve the problem.A parallelogram has a base of length 3x + 1 and a height of x + 1 and has an area of 96 square units. Find the base and height of the parallelogram. (A = bh)
A. height = 4 units; base = 24 units B. height = 6 units; base = 16 units C. height = 2 units; base = 48 units D. height = 8 units; base = 12 units