Express the product as a sum containing only sines or cosines.cos(5?) cos(4?)
A. 
[cos(9?) - cos ?]
B. 
[ cos ? + cos(9?)]
C. 
[cos(9?) - sin ?]
D. cos2(20?2)
Answer: B
Mathematics
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?19 ?b AExpress angle A in terms of b. Use one of the inverse trig functions tan-1, sin-1, or cos-1.
A. A = sin-1 
B. A = tan-1 
C. A = cos-1 
D. A = sin-1 
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Solve the problem. Round to the nearest tenth, if necessaryFind the part if the whole is 24 and the percent is 75.
A. 12 B. 312.5 C. 2.4 D. 18
Mathematics
Use a table to solve the system of equations. If you use a calculator table, record the TbIStart and TbI entered.
4x – y = 14 2x – 3y = 12 A) (4, –1) B) (2, –2) C) (3, –2) D) (3, –3) E) (4, –2)
Mathematics
Shade the part of the whole that is represented by the given fraction.
A. 
B. 
C. 
D. 
Mathematics