Use an identity to write the expression as a single trigonometric function or as a single number.2 cos24x - 1
A. 2 sin 4x
B. cos 8x
C. 
sin 16x
D. cos 4x
Answer: B
Mathematics
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Find all complex solutions for the equation.1 - 
+ 
= 0
A. 
B. {8 ± 
}
C. {9 ± 3i}
D. {8 ± 
i}
Mathematics
Find the work performed when the given force F is applied to an object, whose resulting motion is represented by the displacement vector d. Assume the force is in pounds and the displacement is measured in feet.
?
?
A. 3,720 ft-lb B. 3,690 ft-lb C. 3,730 ft-lb D. 3,700 ft-lb E. 3,740 ft-lb
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = 
, tan ? > 0Find cos 
.
A. 
B. 
C. 
D. 
Mathematics
Write the augmented matrix for the system. Do not solve.-2x - 2y = -26 9y = 45
A. 
B. 
C. 
D. 
Mathematics