The vector r(t) is the position vector of a particle at time t. Find the angle between the velocity and the acceleration vectors at time t = 0.r(t) = (6t2 + 5)i + (4t3 - 3t)k
A. 
B. 
C. 0
D. ?
Answer: B
Mathematics
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Use the given information to find the exact value of the trigonometric function.cos ? = - 
, sin ? > 0
Find cos 
.
A. 
B. 
C. - 
D. - 
Mathematics
Find the exact value using a double-angle identity.sin(180°)
A. - 
B. -1
C. 0
D. 1
Mathematics
Use the vertical line test to determine if y is a function of x.
A. Not a function B. Function
Mathematics
Find the value of the polynomial.-2x5 - 3x4 + 3x3 - x2 when x = -2
A. -12 B. -17 C. -16 D. 17
Mathematics