Question

simplify the inverse trig function with answers (-inf, +inf): cos(inverse)(sqrt3/2)

Answer 1

answers from \[(-\infty,\infty)\] equation is \[\cos^{-1} (\sqrt{3}/2)\]

Answer 2

Cosine takes in angles and gives out a ratio of sides.
Inverse cosine goes backwards. It takes in a ratio of sides, and it tells you what angles have that ratio.

Answer 3

And cos is a/h, so just make a triangle with those sides, then figure out what the angle is.

Answer 4

still have your unit circle or you got it memorized?

Answer 5

I wouldn't use the unit circle here, since the hypotenuse is 2.

Answer 6

But I suppose you could.

Answer 7

sqrt3/2 is a cos/sin of one of the common angles though right?

Answer 8

probably... maybe. Lols.

Answer 9

i have the unit circle i know most of it by heart

Answer 10

ok...
cos(what angle) = sqrt3/2 ???

Answer 11

wait cos is the x-value right? o.o

Answer 12

correct

Answer 13

30 degrees?

Answer 14

yes... but what else?

Answer 15

300 degrees?