Establish the identity.csc2u - cos u sec u= cot2 u
What will be an ideal response?
csc2u - cos u sec u = csc2u - cos u ? 
= csc2u - 1 = cot2u
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 2 for r(t) = (4 - 2t2)i + (10t + 2)j - e-2tk
A. v(2) = 8i + 10j + 2e-4k B. v(2) = -8i + 10j - 2e-4k C. v(2) = -8i + 10j + 2e-4k D. v(2) = -4i +10j + 2e-4k
Find the domain.f(x) = 
A. {x|x ? 20} or [20, ?) B. {x|x ? 0} or [0, ?) C. All real numbers or (-?, ?) D. {x|x ? -20} or [-20, ?)
Perform the addition.6.222 + 5.785
A. 12.107 B. 0.437 C. 12.007 D. -0.437
Find the standard form of the equation of a circle that satisfies the given conditions.Diameter with endpoints (-2, 3) and (-2, -3)
A. x2 + (y - 3)2 = 4 B. (x + 2)2 + y2 = 3 C. (x - 3)2 + y2 = 4 D. (x + 2)2 + y2 = 9