15. determine whether the solution space of the system ax = 0 is a line through the origin, a plane through the origin, or the origin only. if it is a plane, find an equation for it. if it is a line, find parametric equations for it. (a) a = ⎡⎢⎣ −1 1 1 3 −1 0 2 −4 −5 ⎤⎥⎦ (b) a = ⎡⎢⎣ 1 2 3 2 5 3 1 0 8 ⎤⎥⎦

  q

step-by-step explanation:

each line from a vertex to the midpoint of the opposite side is called a median. the point where the medians intersect, point q, is the centroid.

the centroid of δabc is point q.

sina-sinb

cosb+cosa

tana-tanb

cos0+cos x pi/3

20tan

step-by-step explanation:

the answer is a) y= 2 csc [0.5 (x+pi/2)]-1

step-by-step explanation: