The 30/60/90 right triangle is the biggest cliche in trig. We recall the sides come in ratio
First x:
Next y:
Choice C
Which expression does the model represent?
2 answers:
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Here's a diagram showing how to combine angles LDA (in red) and angle ADE (in blue). Hopefully it becomes a bit clearer why these two angles add up to line segment LE. Erase the shared segment DA if it helps show LE better.
See attached image below.
