Find the exact value of trigonometric ratios

Lessons

• 1.
  Find the exact value of all six trigonometric ratios, then make a conclusion
  which primary trigonometric ratios (sin $\theta , cos \theta, tan \theta$) are positive in each
  quadrant
  
  a)

  $\theta$=30°
  
  
  b)

  $\theta$=120°
  
  
  c)

  $\theta$=225°
  
  
  d)

  $\theta$=300°
  
  

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