Say a person's ranked 2nd in a course and their HSC exam mark is much higher than the person ranked first. Is it possible to get a higher atar than the person internally ranked 1st.
Don't take the inverse to start with. Divide both sides by sqrt3. So tanx=-1/sqrt3
Then find the reference angle (use the triangles).
Look at which quadrants tan is negative in, as it is -1/sqrt3