Need up to 30 seconds to load.
now the major important thing whenever
I'm talking about our clink paint goes
and so forth I automatically gonna have
this remembered s equals R times theta
say to yourself a couple times a night
when in the morning
and guess what you'll have it all
memorized when you're ready to take a
testing you only have to stress about it
s equals R times theta do we know what
SS in this case of X right or just
unknown right so I'm just gonna leave
that as s do mean order radiuses ya
radius is 3 meters so I'm gonna leave
that measurement inside there then theta
I do note that it's 30 seconds but what
I said is our theta must be in terms in
radians so I'm going to take 30 degrees
and multiply it by PI over 180 because
what we learned at the beginning of
class that's the way to rewrite that in
Radian form right so that gives you PI
over 6
ok cool so therefore that equals PI over
whoops sorry
so times pi over 6 so then when you
multiply this s equals 3 of our 6
reduces down to PI half's
meters right meters is still there
however ladies and gentlemen listen
listen the meters don't stay there this
is in radians which is in term because
it's in terms of pi but I want you guys
to think about something though if I was
gonna say the distance from here to
Santa would High School is I'm you know
I could say it in meters I could say it
in miles but I'm not going to use pi in
my answer right this is an example where
they're looking for a length we're not
going to want to approximate in terms of
pi what we're gonna want to do in this
case is actually figure out what is pi
divided by 21.57 and that's what I'm
going to approximate it so I'm gonna say
the arc length is approximate one point
five seven meters ok so again think
about the context of the problem if
we're looking at length of measurement
and meters we're not going to want to
use the approximation pi
