Find the measures of two angles, one positive and one negative, that are coterminal with pi divided by two.

Question

yanasidlinskiy · Answer

Two I am thinking of are these: (1)    pi/5 + 2 pi = pi/5 + 10 pi / 5 = (11 pi )/ 5

and (2)   pi/5 - 2 pi = ?

anonymous · Answer

these are the answers to choose from

  three pi divided by two; negative pi divided by two

 pi divided by two + 360°; pi divided by two - 360°

 five pi divided by two; negative pi divided by two

 five pi divided by two; negative three pi divided by two

anonymous · Answer

wait i'm confused, none of the answers have 10pi/5 in them?

yanasidlinskiy · Answer

Ok. To keep you going...I would recommend you asking @hartnn

anonymous · Answer

@hartnn any help?

hartnn · Answer

to get co-terminal angles add 360 to that angle
and subtract 360 from that angle

hartnn · Answer

or in radians, add and subtract 2pi

hartnn · Answer

so calculate 
pi/2 + 2pi =...
pi/2 - 2pi =...

hartnn · Answer

looking at the choice, you don't need to actually calculate them!
there is one choice which says to add and subtract 360 degrees :)

anonymous · Answer

oooh ok got it! thank you!

hartnn · Answer

welcome ^_^

anonymous · Answer

@hartnn any help?

hartnn · Answer

you still need help with this ?
or some new question ?

anonymous · Answer

Don't put that answer, it is wrong.