Points A, B and C are on circle O, as shown. If AC = 20° and AOB = 120°, find the following.
(a) BC
(b) ?BAC
(c) The area of the shaded region.
120°
Mathematics
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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) = e2ti + (9 + e-2t)j + (8 cos 7t)k
A. 0
B. 
C. 
D. 
Mathematics
Graph the inverse circular function.y = cos-1 x
A. 
B. 
C. 
D. 
Mathematics
Determine whether the given ordered pair is a solution to the given system of equations.(-5, 6); 
A. Yes B. No
Mathematics
For the function find the maximum number of real zeros that the function can have, the maximum number of x-intercepts that the function can have, and the maximum number of turning points that the graph of the function can have. f(x) = -3.53x4 - x3 + x2 - 7x + 2
A. 4; 5; 5 B. 4; 4; 3 C. 3; 3; 4 D. 4; 3; 2
Mathematics