Use the sum-to-product formulas to find the exact value of the given expression.
?
?
?
A. ?
B. ?1
C. ?
D. -1
E. 0
Answer: E
Mathematics
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Find the root. Assume that variables represent any real number.
A. 
B. (z - 7)2
C. 
- 7
D. 
- 7
Mathematics
Find the numerical value of the rational expression for the given value of r.
, r = -4
A. - 
B. - 
C. 
D. - 
Mathematics
Use a graphing calculator to solve the equation.18 + 3x = x2
A. -3, -6 B. 3, -6 C. 6, -3 D. 6, 3
Mathematics
Solve the differential equation.
= 3 cos x sec y
A. y = sin (3 sin x + C) B. y = sin-1 (3 sin x + C) C. y = 3 sin x + C D. y = sin-1 (3 cos x + C)
Mathematics