Question

8. Explain the meaning of the statement
arccos(Sq.rt 3 )/2 = pi/6

Answer 1

it means that \(\frac{\pi}{6}\)is the unique number between 0 and \(\pi\) whose cosine is \(\frac{\sqrt{3}}{2}\)

Answer 2

i.e.
\(\cos(\frac{\pi}{6})=\frac{\sqrt{3}}{2}\)