Question

Find the exact real value of arccos (1/2)

Answer 1

what do u think ?

Answer 2

i don't even know what arccos is.........

Answer 3

you know where cos is ?
see the unit circle
http://en.wikipedia.org/wiki/File:Unit_circle_angles_color.svg

Answer 4

when is cos value = 1/2 ???
see the x co-ordinate

Answer 5

i typed it into google and this is what i got... 1.04719755 rad

Answer 6

yeah, that equals pi/3 too!
see pi/3 angle , you'll see (1/2, sqrt 3/2)
means cos pi/3 = 1/2
sin pi/3 = sqrt 3/2
:)

Answer 7

thank you so much for all your helpppp (:

Answer 8

welcome ^_^