Use the graph to complete the identity.cos 3x cos 
x + sin 3x sin 
x = ? 
A. y = sin y = cos 
x
B. y = cos 
x
C. y = sin y = cos 
x
D. y = cos y = cos 
x
Answer: B
Mathematics
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Solve the problem.An airplane is flying in the direction 39° east of south at 885 km/hr. Find the component form of the velocity of the airplane, assuming that the positive x-axis represents due east and the positive y-axis represents due north.
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.Find A if C = 4 and B = 2. Round answer to the nearest thousandth. 
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve the equation.7(3x - 12) = 6(3x - 12)
A. 3 B. 5 C. 6 D. 4
Mathematics
Multiply and write the product as a mixed number in simplest form.-4
? 
A. 12 B. -14 C. -12 D. 11
Mathematics