(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two cables are attached to a sign at point A to steady the sign as it is being lowered. Using Trigonometry, determine a) the magnitude and direction of the smallest forcePfor which the resultantRof the two forces applied at A is vertical, b) the corresponding magnitude ofR

2. Relevant equations

Use Law of cosines (R^2 = Q^2 + P^2 - 2QPcos(theta))

and Law of sines P/sin(opp. angle) = Q/sin(opp. angle)

3. The attempt at a solution

diagram is shown in attachment. I only have one magnitude and one angle and I'm supposed to get an angle alpha so that P is the min.

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# Homework Help: Tension Problem using Trig

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