Solve for x in the given interval.sec x = -2, ? ? x ? 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the acceleration vector.r(t) = (cos 2t)i + (4 sin t)j
A. a = (-4 cos 2t)i + (-16 sin t)j B. a = (-4 cos 2t)i + (-4 sin t)j C. a = (-2 cos 2t)i + (4 sin t)j D. a = (4 cos 2t)i + (-4 sin t)j
Mathematics
Use implicit differentiation to find dy/dx and d2y/dx2.xy + 3 = y, at the point (4, -1)
A. 
= 
; 
= 
B. 
= - 
; 
= 0
C. 
= 3; 
= - 24
D. 
= 
; 
= - 
Mathematics
Provide an appropriate response.
and 
__________.
A. are perpendicular B. coincide C. intersect D. are parallel
Mathematics
Find the angle in degrees when given the trigonometric values. ? represents the unknown angle measure.cot ? = 1.8
A. 27° B. 29.0° C. 27.0° D. 29°
Mathematics