Express the function as a trigonometric function of x.cos 4x
A. 3 sin x - 4 sin3x
B. cos3x - 3 sin2x cos x
C. cos4x - 6 sin2x cos2x + sin4x
D. 4 sin x cos3x - 4 sin3x cos x
Answer: C
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Evaluate the indicated double integral over R.
; R = {(x, y): 0 ? x ? 1, 0 ? y ? 1}
A. 
(e5 - e3 - e2 + 1)
B. 
(e5 - e3 - e2 - 1)
C. 
(e5 - e3 - e2 + 1)
D. 
(e5 - e3 - e2 - 1)
Find the radian measure of a central angle ? in a circle of radius r, assuming that ? intercepts an arc of length s. Round your answer to three decimal places when necessary.r = 14.1 in., s = 22 in.
A. 0.641 B. 310.2 C. 1.56 D. 4.902
Fill in the blank with one of the words or phrases listed below. 
In the proportion 
= 
, x ? 16 and 2 ? 7 are called 
.
A. right B. ratio C. congruent D. cross products
Find the angle rounded to the nearest tenth of a degree.cos A = 0.7376A = __________ o
Fill in the blank(s) with the appropriate word(s).