[填空题]
Vector A is 75 cm long and points apc0uc, rdp/d m 2a/h-s,z9mb8 :7d 8izbra ws3ty(nnut $30^{\circ}$ above the positive x axis. Vector B is 25 cm long and points along the negative x axis. Vector C is 40 cm long and points at $45^{\circ}$ below the negative x axis. (a) Determine the x and y components of Vector A: $A_x=$ $cm$ and $A_y=$ $cm$ (b) Determine the x and y components of Vector B: $B_x=$ $cm$ and $B_y=$ $cm$ (c) Determine the x and y components of Vector C: $C_x=$ $cm$ and $C_y=$ $cm$ (d) Determine the sum of these three vectors in terms of components. $R_x=$ $cm$ and $R_y=$ $cm$ (e) Determine the sum of these three vectors in terms of magnitude $cm$ and the tangent value of the direction angle (measured from the positive x-axis rotated in the counterclock wise direction) $\tan \theta=$ (Please only fill in numerical value in the above blanks!)
