Question

Consider the three displacement vectors shown in the figure: Vector A→ has a magnitude of 7.90 km and a direction that makes an angle θ = 31.0° to the

left of the positive y-axis, vector → B has a magnitude of 6.20 km and a direction that makes an angle of α =28.0° above the positive x-axis, and vector →C has a magnitude of 4.10 km and a direction that makes an angle β = 57.0° below the negative x-axis. Determine the magnitude of the vector →D  = → A − →B +→C

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