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## Homework Statement

http://session.masteringengineering.com/problemAsset/1127110/6/Probs.2-39_40.jpg

I will refer to this picture for the problem.

I have to find the resultant of the three force vectors. I know all except F1 and theta. I am given it for this problem to find the resultant. F1=510N and theta=20 degrees.

## Homework Equations

Each theta is the degrees from positive x axis.

Fx1cos(theta1)+Fx2cos(theta2)+Fx3cos(theta3)=x

Fy1sin(theta1)+Fy2sin(theta2)+Fy3sin(theta3)=y

sqrt(x^2+y^2)=answer

## The Attempt at a Solution

510cos(70)+600cos(150)+400cos(30)=1.22

510sin(70)+600sin(150)+400sin(30)=979.24

sqrt(1.22^2+979.24^2)=979.24