Use sine ratio to calculate angles and side (Sin = $\frac{o}{h}$ )

Lessons

• Introduction
  What are sine, cosine and tangent?

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• 1.
  Determine each sine ratio using calculator
  
  a)

  $\sin 60^\circ$
  
  
  b)

  $\sin-60^\circ$
  
  

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• 2.
  Determine the angle to the nearest degree
  
  a)

  $\sin \theta =0.57$
  
  
  b)

  $\sin \theta = -0.65$
  
  

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• 3.
  Determine the angles and sides using Sine ratio
  
  a)

  Find angle A and B:
  
  
  
  
  
  b)

  Find the value of "x" using sine
  
  
  
  
  
  c)

  Find the value of "x" using sine
  
  
  
  
  

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• 4.
  Draw and label a right triangle to illustrate sine ratio, then calculate the angle.
  a)

  $\sin \theta = {5 \over 13}$
  
  

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