Question

How do you convert from radians to degrees?

Answer 1

times it by 180/pi

Answer 2

or divide it by pi/180
same thing

Answer 3

the question is -3 radians

Answer 4

so its -540/pi

Answer 5

or do i divide by 180?

Answer 6

yes, -540/pi

Answer 7

you could evaluate that to get a decimal point, but it seems unecessary

Answer 8

they say to round to the nearest degree, -540/pi is still the answer right? since its a whole number right?

Answer 9

oh, if they say to the nearest degree, you have to figure out what -540/pi is in decimal places, then round off

Answer 10

so i would divide by 180 correct?

Answer 11

no, type -540/pi into a calculator to get a decimal

Answer 12

i got -17.18873386

Answer 13

mover the dp one space to the right

Answer 14

*move

Answer 15

oh ok, got it, and for when you convert from degrees to radians, do i do the same if i wanted to round it to the nearest hundredth? put it into the calc?

Answer 16

yea, it's the fastest way. otherwise you could do it by hand, but I don't think that would be easiest because pi is like 3.1419...

Answer 17

degrees --> radians
times by pi/180

radians --> degrees
times by 180/pi

Answer 18

so like for 5pi/6 what do i do

Answer 19

why is it we sometimes use 180 as pi and we sometimes don't

Answer 20

think of the unit circle:
the circumference of it is 2pi (because it is 2pi*r, and r is 1)

we also know that a revolution is 360 degrees
so: 2pi=360degrees

Answer 21

that means 180 degrees=pi radians, but no one really says radians

Answer 22

WOWWW that makes sense...thanks a lot seriously you answered all of my questions, no ones ever done that, my math teacher hates me so I'm always on this when i get home just to try and pass my trig class, i failed my trig regents with a 64, 1 point shy...so now I'm in the class again. Maybe ill do well this time around, Thanks again! :)

Answer 23

no problem :) happy to help

Answer 24

btw i don't know if you know what a regents is, its like a state test only for people who live in NY and like pennsylvania, and i live in ny so i had to take it, so yea, so thanks again

Answer 25

no problem, I'm from Australia so we don't really have those but good luck in the future! What yr are you?
I'm a yr 11, just started a few weeks ago

Answer 26

Im a year 11 aswell looks like your smarter than me :P They take SATS in australia? Its like a college admissions test.

Answer 27

I did yr 11 maths whilst I was a yr 10 so yea...I may advance in maths but my English is nowhere near as good as my maths
yea, SATs. I don't really look that far ahead into the future :)

Answer 28

I've heard of SATs, but don't know if they have them in Australia. probably do but I ahve my face burried in my maths book so I don't know

Answer 29

I see...dont you take your SATs at the end of this year? or is it different in Australia?

Answer 30

I don't know...school has started but I'm actually STILL overseas so I don't really know if SATs have been mentioned yet, or if we even have them. I'll google it :)

Answer 31

oh never mind, but yea there important, I'm already studying for them, anyways it was a nice conversation, never thought i would have one over a website like this, but it was nice talking, oh and thanks for the help, i'll try and lend my help if I see a question I understand :)

Answer 32

I think in Australia we call them VCE exams or something VCAA exams
and we get ATAR scores in Yr 12, ATAR scores are basically ranks

Answer 33

Weird how in different countries they do it differently, would've thought it would be the same.

Answer 34

Anyways, it was nice talking :)

Answer 35

you too :)