Question

9*| arccos(-0.5)-PI/2 | / (arccos(-0.5)-PI/2)

Answer 1

ErkoT: all these problems are basically of the form:\[\frac{a*|b|}{b}\]where the answer is:
1 if b > 0
-1 if b < 0
undefined if b = 0

Answer 2

sorry - replace the '1' with 'a' above

Answer 3

@ErkoT did you try this?

Answer 4

Sorry, was afk. haven't managed to try that one yet.

Answer 5

Ok try it, If you get stuck do let me know:)

Answer 6

2*Pi/3 > Pi/2 , therefore 9*POSITIVE/POSITIVE=9 ?

Answer 7

correct

Answer 8

Thanks!

Answer 9

Great work @ErkoT

Answer 10

Thank you again!