Question

Find all solutions to the equation.

7 sin2x - 14 sin x + 2 = -5

Answer 1

PLEASE HELP

Answer 2

is it sin 2x or sin^2x

Answer 3

sin^2x

Answer 4

7sin^2x-14sin x+2+5=0
right?

Answer 5

yes

Answer 6

7sin^2x-7sin x-7sin x+7=0

Answer 7

do u need any more help?

Answer 8

how do I get the solutions? do I factor?

Answer 9

ya

Answer 10

should my answer have pi in it?

Answer 11

7sinx(sinx-1)-7(sinx-1)=0

Answer 12

π radian=180 degree

Answer 13

u can convert degree to radian
or radian to degree

Answer 14

im very confused

Answer 15

ok. did u get my last step of ur math

Answer 16

yes

Answer 17

(7sinx-7)(sinx-1)=0

Answer 18

7(sinx-1)(sinx-1)=0

Answer 19

(sinx-1)(sinx-1)=0

Answer 20

when I did that I had another (sinx-1)


7(sinx-1)^3

Answer 21

now is it clear to u?

Answer 22

no.. I don't know what to do with the sin x

Answer 23

did u get my last step

Answer 24

(sinx-1)(sinx-1)=0

Answer 25

sinx-1=0

Answer 26

how did you get rid of the other sinx-1

Answer 27

sinx=1

Answer 28

ok
(sinx-1)^2=0
right?

Answer 29

yes

Answer 30

now i wanna take square root of both side

Answer 31

sinx-1=0
right?

Answer 32

ohhh gotcha

Answer 33

So how do I know that that is the only answer?

Answer 34

sinx=1
sinx=sin 90
x=90
x=π/2

Answer 35

medal?

Answer 36

I'm plugging those into my calculator and only 1 is working