(sorry the picture didn’t download clearly)
These are triangles 1,2 &3. All are missing the angle and each triangle uses one of the three different trig ratios.
Triangle A: Uses the sin ratio, as only the opposite and hypotenuse are labeled with a measurement.
Triangle B: Uses the tangent ratio, as only the opposite and adjacent sides are measured.
Triangle C: Uses the cosine ratio, as only the hypotenuse and adjacent are labeled.
All the triangles sides are labeled in according to the placement of the missing angle.
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