What is the Tension in a Cable?

[wannawin]

Homework Statement

a) A rectangular plate is supported by three cables. Knowing that the tension in cable AB is 405N, determine the force at B.
b) For the plate in the above question determine the force in cables AB and AD knowing that the tension in AC is 54N.

The Attempt at a Solution

I guess I'm just a little confused as to the wording of this question. For part a) is it just simply resolving the 408N force into components? And for part b) is anything from part a) given or found relevant?

 

[nvn]

wannawin: Answers to your two questions: (1) Yes. (2) No.

By the way, whoever wrote your book (or the page you posted) is unknowledgeable of the correct way to write units. There should always be a space between the numeric value and its following unit symbol. E.g., 408 N, not 408N. See the international standard for writing units (ISO 31-0).