Find the product or quotient, as indicated. Leave your answer in trigonometric form.Find the product of z1 and z2.z1 = 2[cos (-80°) + i sin (-80°)], z2 = 25(cos 200° + i sin 200°)
A. 50(cos 120° + i sin 120°)
B. 50(cos 280° + i sin 280°)
C. 27(cos 120° + i sin 120°)
D. 50(cos -16,000° + i sin -16,000°)
Answer: A
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Solve the problem.Find the moment of inertia about the y-axis of the thin infinite region of constant density 
in the first quadrant bounded by the coordinate axes and the curve 
.
A. 
B. 
C. 
D. 
Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = (-2x + 7)3
A. y = u3; u = -2x + 7; 
= -6(-2x + 7)2
B. y = u3; u = -2x + 7; 
= -2(-2x + 7)3
C. y = u3; u = -2x + 7; 
= 3(-2x + 7)2
D. y = 3u + 7; u = x3; 
= -6x2
Provide an appropriate response.Explain why the solution of a system of equations is the point of intersection of the graphs of the equations.
What will be an ideal response?
Simplify the expression.
A. tan 8x B. tan (-2x) C. tan 2x D. tan (-15x)