Use a calculator to find the approximate value of the expression. Round the answer to two decimal places.tan 22°
A. 0.01
B. -0.13
C. 0.54
D. 0.40
Answer: D
Mathematics
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Find the principal unit normal vector N for the curve r(t).r(t) = (3 + t)i + (7 + ln(cos t))k, -?/2 < t < ?/2
A. N = (-sin t)i - (cos t)k B. N = (-cos t)i - (ln(cos t))k C. N = (-cos t)i - (tan t)k D. N = (cos t)i + (sin t)k
Mathematics
Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the x-axis.x = 2y2, x = - 2y, y = 2
A. 
?
B. 
?
C. 
?
D. 
?
Mathematics
Solve the problem.Assuming C is a simple closed path , what is special about the integral 
? Give reasons for your answer.
What will be an ideal response?
Mathematics
Solve.x3 + 4x2 - 4x - 16 ? 0
A. [-2, 2] ? [4, ?) B. [-4, -2] ? [2, ?) C. [-4, 2] D. [-4, ?)
Mathematics