Hey, just wanted to make sure I got the right answer on my test because my teacher and I are at odds...find the exact value of arccos (sin (7pi/6)). Now the answer that I got was 2pi/3; however, my teacher says it's 5pi/6??? Any insight

Question

anonymous · Answer

I got 2pi/3 as well.  by hand and with my TI NSpire  /shrug

anonymous · Answer

Thank you! Just needed that Assurance ;) Seems like she might need a lesson or two

anonymous · Answer

lol or something.  if you graph it on a calc as well it comes out as 2.0944  good luck