Question

PLEASE HELP!!!!
If sin = -3/5 , find sin 2theta given that θ is in the 3rd quadrant.

Answer 1

does anyone know how to solve this??

Answer 2

do you know how to use arcsin?

Answer 3

yes

Answer 4

oh wait... so is it that sin(x)=-3/5 or sin(2x)=-3/5 ?

Answer 5

\[\sin 2 \theta \]\
theta=-3/5

Answer 6

well plug in theta and then look for sin(2x) on the identity sheet.

Answer 7

i did but i didnt get an answer what did u get??

Answer 8

im getting decimals

Answer 9

is it 9/25?

Answer 10

hello??

Answer 11

sin2T=sinTcosT,
since, sinT=3/5, cosT=4/5
so, sin2T= 2 sinTcosT = 2.(3/5.4/5) = 24/25,
since the Theta in quadrant III, theta will be = negative...so = -24/25

Answer 12

soory, sin2T = 2. sinT.cosT