Select the correct answer from each drop-down menu. A student began a proof of the law of sines using triangle XYZ. His work is shown.
The student has _ started the proof.
The next step in the proof is to _.
Then the student should _.
1. correctly / incorrectly
2. express h in terms of angle X and side z / express h in terms of angle Y and side y / express y in terms of angle z and side x
3. use the law of cosines / use the tangent function / set the expressions for h equal / use the law of cosines