The polar equation of a circle is given. Give polar coordinates for the center of the circle and identify its radius.r = -4 sin ?
A. C
, radius = 4
B. C
, radius = 2
C. C
, radius = 2
D. C
, radius = 4
Answer: B
Mathematics
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Find the curvature of the space curve.r(t) = -4i + (t + 10)j +(ln(cos t) + 1)k
A. ? = sin t B. ? = cos t C. ? = sec t D. ? = csc t
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
- 
A. 
B. 
C. 
D. 
Mathematics
find Zp when Np = 450, Ns = 39 and Zs = 8 ê.
´ 2à ³N ³ ³ p³ If Z = ³Äij Zs, ³ 2³ ³N ³ ’ sÅ a. 1.06 Kê b. 852 ê c. 72.6 ê d. 8.48 Kê e. 92.3 ê
Mathematics
Solve the problem.Find an equation for the level surface of the function f(x, y, z) = ln
that passes through the point 
.
A. ln 
= 
B. 
= e16
C. 
= e13
D. ln 
= 16
Mathematics