Question 852486
A vertical mast [PQ] is supported by two sraight cables [PS] and [PR]. The cables are joined to level ground at S and R where |SR| = 15cm. |RQ| = 17.4cm and |<PRQ| = 50 degrees. What is the length of |PR| and |PS| to the nearest metre?
 
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tan(50 degrees) = PQ/RQ = PQ/17.4
So, PQ = 17.4*tan(50) = 20.74 cm
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sin(50) = PQ/PR 
PR = 20.74/sin(50) = 27.07 cm
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SQ = ?
tan(PSQ) = PQ/SQ = 20.74/?
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Cheers,
Stan H.
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