Question

Algebra 2 help

Answer 1

for this question first you to do is to convert radian into degrees

Answer 2

how do i do that? i'm super confused on this

Answer 3

Do you know how to change it ?

Answer 4

i've tried but i keep getting nothing close to it.

Answer 5

Come here http://www.google.co.in/intl/en/help/features.html#calculator

Answer 6

okay i'm there

Answer 7

what do i do?

Answer 8

7 pi/4, -pi/4 <--radius 315, -45 <---degress

Answer 9

Yes now its correct

Answer 10

now what do i do? @goformit100

Answer 11

@Best_Mathematician @terenzreignz

Answer 12

step 1. convert radians into degrees
step 2. subtract the degrees by 90, 180 or 270 depending on which quadrant they are
step 3. select the sin, cosine value of that particular function
step 4. add minus or plus sign depending on which quadrant they are

Answer 13

So your saying I pick one of these 315, -45 then subtract is by 90,180 or 270. then with that answer i sin it ?

Answer 14

lemme give u example
lets say you need to find sin 3pi/4
step one 3pi/4 in degrees is 135
now we know it is in second quadrant so
step 2 135-90 = 45
step 3. sin 45 is \[\frac{ \sqrt{2} }{ 2 }\]
step 4 as it is in 2nd quadrant the value of sin is positive so it is + \[\frac{ \sqrt{2} }{ 2 }\]

Answer 15

this will assist you further