18.5 Solving expressions using 30-60-90 special right triangles
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Solving expressions using 30-60-90 special right triangles

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Notes:
sin30=12 \sin 30^\circ = { 1 \over 2}
cos30=32 \cos 30^\circ = {{\sqrt 3} \over 2}
tan30=13 \tan 30^\circ = {1 \over \sqrt 3}
sin60=32 \sin 60^\circ= {{\sqrt3} \over 2}
cos60=12 \cos 60^\circ= {1 \over 2}
tan60=31 \tan 60^\circ = {{\sqrt 3} \over 1}


  • 2.
    If θ=30 \theta = 30^\circ , find the exact value of the following expressions.
  • 3.
    If θ=60 \theta = 60^\circ , find the exact value of the following expressions.
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Solving expressions using 30-60-90 special right triangles

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