Yes, 60° is right.
Do you need me to explain why?
You have to use sin/cos/tan values
Zero. The negative one means arctan. Arctan times 0 is 0.
THE ANSWER ABOVE IS INCORRECT!! If you are doing Apex, the answer is doubling a cube. It can't be done with a straightedge or compass so it is impossible and was believed to be Apollo wanted something of his doubled with was a cube.
