Find the integral.
A. 12 cos x3 + C
B. 4 cos x3 + C
C. 
cos x3 + C
D. 
x3 cos x3 + C
Answer: C
Mathematics
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Solve.The pitch P of a musical tone varies inversely as its wavelength W. One tone has a pitch of 433 vibrations per second and a wavelength of 8.4 ft. Find the wavelength of another tone that has a pitch of 480 vibrations per second.
A. 7.6 ft B. 0.00004 ft C. 24,742.9 ft D. 0.13 ft
Mathematics
Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.cos x - cos x sinx = cos3 x
A. 
B. ?
C. 0
D. 
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Graph the function as a solid curve and its inverse as a dashed curve.f(x) = -7x + 8
A. 
B. 
C. 
D. 
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Evaluate the expression for the given value or values.x + y for x = 15, y = 12
A. 72 B. 27 C. 63 D. 36
Mathematics