Numerical - Angle made by coplanar forces

Discussion

• dinesh thale   -Posted on 01 Apr 21
  here, we want origin of sine rule . every question have short discusion from where it come's .. so it will be easily understood by student..lastly thank you so much...
  
• Rajesh kumar   -Posted on 31 May 16
  Vill nagra post neemgaon dicet lakhimpur kheri
• Sravanthi   -Posted on 14 Dec 15
  In this condition, force A is greater than force of X and Y. Hence, it is the condition of non perpendicular resolution.
  
  Non perpendicular resolution: It is defined as the resolution in which force resolved in two directions and they are not perpendicular to each other.
  
  By using Sine rule,
  
  (80 / sin α) = 40 / sin (180 – 2α)
  
  sin α = 2 sin 2α
  
  sin α = 2 [ 2 sin α cos α]
  
  cos α = (1 / 2)
  
  α = cos ^-1 (1 / 4)
  
  α = 75.52°

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