Question

Is sin 15 degrees is the same as pi/12? I'm suppose to find the exact value of the expression. multiple choice hw

Answer 1

pi/3 = 60
pi/6 = 30
pi/12 = 15

Answer 2

180/3 = 60
180/6 = 30
180/12 = 15

Answer 3

so I got that part right. thanks! ......please continue explanation

Answer 4

amistre amistre amistre

Answer 5

sin(15) = sin(45-30)

Answer 6

\[\frac{\pi}{3}\] is not more 60 than 0 is 32

Answer 7

sin(a-b) = sinacosb-sinbcosa

Answer 8

0 degrees Celsius is the same temperature as 32 degrees F, but they are by no means the same number!

Answer 9

pi 180
---*---- = 60
3 pi

Answer 10

true but that hardly means that \[\pi = 180\] \[\pi\] is a number close to 3, and 180 is many times bigger

Answer 11

sin(15) = sin(45)cos(30) - sin(30)cos(45)

Answer 12

when converting between degrees and radians; pi = 180

Answer 13

just as 2pi = 360

Answer 14

the point is that an angle measured is 15 degrees is the same as an angle measured in
\[\frac{\pi}{12}\] radians

Answer 15

i will be quiet now

Answer 16

mmm. i think i understand. is the exact value squareroot2 ( squareroot 3 - 1) over 4?

Answer 17

thank you amistre and satellite! ..just please correct my answer if i'm wrong

Answer 18

sin(15) = \(\frac{1}{\sqrt{2}}\frac{\sqrt{3}}{2}-\frac{1}{2}\frac{1}{\sqrt{2}}\)

Answer 19

sin(15) = \(\frac{\sqrt{6}}{2}-\frac{\sqrt{2}}{2}\)

Answer 20

over 4 is right

Answer 21

\[\sin(15)=\frac{\sqrt{6}-\sqrt{2}}{4}\] IF I DID IT RIGHT

Answer 22

caps stuck lol

Answer 23

nice latex too!

Answer 24

i think i missed it somewhere

Answer 25

\[sin(15) = sin(45)cos(30) - sin(30)cos(45)\]
\[{\sqrt{2} \over 2}.{\sqrt{3}\over 2}-{1 \over 2}{\sqrt{2}\over 2}\]
\[{\sqrt{6}\over 4}-{\sqrt{2}\over4}\]

Answer 26

thank u
i'm doing it on paper..ur much faster

Answer 27

\[\sqrt{6}-\sqrt{2} \over 4\]

Answer 28

this an take a few forms; all that equal the same thing but look different based upon how you went thru the stuff

Answer 29

http://www.wolframalpha.com/input/?i=sin%2815%29

Answer 30

im right lol

Answer 31

WOW THANKS!