Question

Find all solutions to the equation.

7 sin2x - 14 sin x + 2 = -5

Answer 1

add 5 on each side n tell what u got??

Answer 2

if you add 5 then its 7sin2x-14sinx+2=0??

Answer 3

on both side

Answer 4

on left side also

Answer 5

i meant to put a 7 instead of a 2

Answer 6

7sin2x-14sinx+7=0?

Answer 7

now take out 7 from each term

Answer 8

sin2x-2sinx+1 ?

Answer 9

yeah u see some thing now ??

Answer 10

(sinx)^2-2*1*sinx+1^2?? ring a bell ??

Answer 11

no it doesnt im not good at this

Answer 12

(a-b)^2=a^2-2*a*b+b^2 now ....remember it ??

Answer 13

oh yeah i know that i eaquation so do i just put it like that?

Answer 14

@gorv

Answer 15

yeah we got in our what on right side ....we need to put it in like left side

Answer 16

what is similar to a??

Answer 17

sin2x?

Answer 18

sinx

Answer 19

sin2x is a^2

Answer 20

a=sinx
and b= 1

Answer 21

(sinx-1)^2=0

Answer 22

which means sinx-1=0

Answer 23

sinx =1

Answer 24

ok so (sinx-1)^2=sinx^2-2*sinx*1+1^2

Answer 25

yeah

Answer 26

@gorv

Answer 27

so then what do i do?

Answer 28

sinx=1

Answer 29

solution= (2n-1)*pi/2

Answer 30

n=1,2,3,4.................

Answer 31

so the answer we would get from that is (2n-1)*pi/2

Answer 32

@gorv

Answer 33

yeah

Answer 34

ok Thnaks!

Answer 35

and n=1,2,3,4........and so on