Express the product as a sum containing only sines or cosines.cos 
cos 
A. 
[cos (3?) - sin (2?)]
B. 
cos2 (5?)
C. 
[cos (6?) - sin (4?)]
D. 
[cos (2?) + cos (3?)]
Answer: D
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Evaluate the function for the given values of a and b. Then use the intermediate value theorem to determine which of the statements below is true.a = -2 and b = -1f(x) = 3x5 - 9x3 - 9x2 + 5
A. f(-2 ) and f(-1) have opposite signs, therefore the function f does not have a real zero between -2 and -1. B. f(-2 ) and f(-1) have the same sign, therefore the function f has a real zero between -2 and -1. C. f(-2 ) and f(-1) have the same sign, therefore the intermediate value theorem cannot be used to determine whether f has a real zero between -2 and -1. D. f(-2 ) and f(-1) have opposite signs, therefore the function f has a real zero between -2 and -1.
Write the sentence as a mathematical statement.Thirteen is less than or equal to fifteen.
A. 13 < 15 B. 13 ? 15 C. 13 ? 15 D. 13 ? 15
Solve the system by substitution. 2u + v = 24u - 3v = -6
A. u = - 
, v = 2
B. u = 0, v = 2
C. u = 2, v = 0
D. u = 2, v = - 
Establish the identity.cos
= 
cos x - 
sin x
What will be an ideal response?