Question

please help ::what are octants how to determine which octant if we are given a random point (x,y,z)?

Answer 1

octants are just like quadrants except in 3-d
1st octant is all positive values
2nd octant, x neg, y pos, z pos
3rd octant, x neg, y neg, z pos
4th octant, x pos, y neg, z pos
5th octant x pos, y pos, z neg
6th octant, x neg, y pos, z neg
7th octant, x neg, y neg, z neg
8th octant, x pos, y neg, z neg

hope i got them in right order

Answer 2

oh can u say any trick to find the sign dor any random point i cant memorize this!!

Answer 3

just remember the quadrants: ++, -+, --, +-
then think of it as 1 quadrant on top of another
top quadrant has positive z
bottom quadrant has neg z

Answer 4

but hw do i get the quadrant no??

Answer 5

depends on the x and y values ?

Answer 6

not that say if i get a point like (-3,4,-5) how will i say the octant no: directly??

Answer 7

(-3,4) is -+ so in 2nd quadrant
z = -5
add 4 to get octant
4+2 = 6th octant

if z is negative, just add 4

Answer 8

oh u mean in general we can get the first 4 octants easily as they are similiar to 2 cordinate axes and if we have z as negative then add 4 ??

Answer 9

yep i think that will work

Answer 10

wow superb thx a lot i was preparing for an xam tmrw that really helps i wish i could giv u more than one medals!!

Answer 11

thanks :)