Solving for Force Components: Magnitude & Direction | 640 N, 39° North of East

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The force vector has a magnitude of 640 N at an angle of 39° north of east. The north-south component is calculated as 497.4 N, while the east-west component is 402.8 N, derived using cosine and sine functions. There is concern about significant figures when entering these values into WebAssign. The user is uncertain whether to round the components to 497 N and 403 N. Accurate input is crucial to avoid errors in the assignment.
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A force vector has a magnitude 640 N and a direction of 39° north of east. Determine the magnitude and direction of the components of the force that point along the north-south line and along the east-west line.

North-south component:

East-west component:

I know that the direction of these two components are north and east, but for the magnitudes i got 497.4 and 402.8, respectively. I used cos(39)640 and sin(39)640. Please if anyone can help it would be greatly appreciated, this question is for a webassign. Thank you very much
 
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I have a feeling its a sig fig error...do I put 497 and 403 into webassign instead? I just really don't want to get this question wrong for something stupid...
 

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