Posted by Stone on .
2 vectors act on a bolt. vector 1(1200/70 degrees) vector 2(900/205 degrees) then E = ? must show work!

Trig 
Henry,
V1 + V2 = 1200[70o] + 900[205o]
X = 1200*cos70 + 900*cos205 = 405.3
Y = 1200*sin70 + 900*sin205 = 747.3
tanAr = Y/X = 747,3/405.3 = 1.84376
Ar = 61.53o = Reference angle.
A = 61.53 + 180 = 118.5o
Vr = Y/sinA = 747.3/sin118.5 = 850.3[118.5o] = Resultant vector.