Use an identity to write the expression as a single trigonometric function or as a single number. 2 cos2 
- 1
A. - cos
B. cos
C. - cos
D. cos
Answer: B
Mathematics
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13
- 5
A. 7
B. 18
C. 7
D. 17
Mathematics
Provide an appropriate response.Factor the special product: x2 - 64
A. (x - 8)(x - 8)
B. 
2
C. 
2
D. (x + 8)(x - 8)
Mathematics
Factor.4a2 - b2
A. (2a - b)(2a + b) B. (2a - b)2 C. (2 - b)(2 + b) D. (2b - a)(2b + a)
Mathematics
Determine the angle between u and v. Give the angle in degrees rounded to the nearest tenth of a degree.u = 3j, v = 9i - 3j
A. 71.6° B. 108.4° C. 161.6° D. -18.4°
Mathematics