Solve the problem.Find the area A of a rectangle with length 4 in and width 15 in.
A. A = 60 in2
B. A = 19 in2
C. A = 16 in2
D. A = 120 in2
Answer: A
Mathematics
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Solve the initial value problem.
= 
- 
, y(0) = -1
A. y = 2 tan-1 x - 1 B. y = 2 cot-1 x - 3 sin-1 x C. y = 2 tan-1 x - 3 sin-1 x - 1 D. y = 2 tan-1 x - 3 sin-1 x + 1
Mathematics
Solve the problem.When an alternating current passes through a series RLC circuit, the voltage and current are out of phase by angle ?. Here ? = tan-1[(XL - XC)/R], where XL and XC are the reactances of the inductor and capacitor, respectively, and R is the resistance. Find d?/dR for constant XL and XC.
A. 
B. 
C. 
D. 
Mathematics
Verify that each equation is an identity.
= 
What will be an ideal response?
Mathematics
Write the number in standard form.7(cos 150° + i sin 150°)
A. 
+ 
i
B. 
- 
i
C. 
- 
i
D. 
+ 
i
Mathematics