Question

Find an exact value.

sine of negative eleven pi divided by twelve.

Answer 1

use your calculator.
Make sure your mode is set to radians
sin(-11pi/12)=
-0.2588

Answer 2

no the answers not supposed to be a decimal

Answer 3

addition formula
divide 11pi/12 into two fraction
both should be on the unit circle so we can use \[\rm \sin(x \pm y)=sinx *\cos y \pm \cos x* siny\]

Answer 4

what two radian on the unit circle would you add or subtract to get 11pi/12 ??

Answer 5

I don't know what to do with that

Answer 6

Um let me think

Answer 7

2pi/3 and pi/4?

Answer 8

correct now use the that formula

Answer 9

do i use the addition or subtration sign?

Answer 10

you would add 2pi/3 +pi/4 to get 11pi/12 so addition

Answer 11

i plugged it in but whats the next step?

Answer 12

oh wait i think i know

Answer 13

okay :=)) try it post ur work i'll check it ot

Answer 14

would it be\[(\sqrt{6}-\sqrt{2})/4\]

Answer 15

what is sin 2pi/3 ??

Answer 16

\[\sqrt{3}/2\]

Answer 17

right your answer is correct !

Answer 18

thank youuuuu

Answer 19

np :=))