Write the product as a sum or difference containing only sines or cosines.cos(3?) cos(5?)

A. [cos(8?) - sin(2?)]
B. [cos(2?) + cos(8?)]
C. cos2(11?2)
D. [cos(8?) - cos(2?)]


Answer: B

Mathematics

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Solve the problem.The tooth geometry for a particular saw blade is modeled by the following functional relationship between the tooth height, f(x), relative to an imaginary flat edge, and the distance, x, along that reference edge:Find ao, three nonzero cosine terms (if they exist), and three nonzero sine terms (if they exist) of the Fourier series for this geometrical definition.

A. f(x) = 1 -  
B. f(x) = 1 + 
C. f(x) = 1 + 
D. f(x) = 1 - 

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Use quotient identities to find the indicated function value.cos ? = , tan ? = ; find sin ?

A.
B.
C.
D.

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Decide whether or not the equation defines y as a function of x.y = 2x2 + 2x - 1

A. Yes B. No

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Factor the trinomial completely, or state that the trinomial is prime.24x2 - 104x - 80

A. 8(3x - 2)(x + 5) B. prime C. 8(3x + 2)(x - 5) D. (24x + 16)(x - 5)

Mathematics