Question

simplyfy

Answer 1

\[0.2=\cos(\frac{ \pi t }{ 12 })\]

Answer 2

solve for t

Answer 3

\[\frac{\pi t}{12}=\arccos (0.2)\]

Answer 4

oopss i did not think this way thx

Answer 5

but are you allowed to use calculator \[\pi t/12=\pm \arccos(0.2)+2 \pi k,\forall k\in Z\]

Answer 6

i got 5.231 but i only got one what about other value