## AFleming42 2 years ago Find all solutions to the equation in the interval [0, 2π). sin 2x - sin 4x = 0 I NEED HELP I DON'T UNDERSTAND THIS CRAP.

1. Reaper534

srry dont really know

2. Reaper534

im only in geomerty

3. AFleming42

4. Reaper534

is it multipulchoise

5. Lukecrayonz

sin(2x) + sin(4x) = 0 sin(2x) + 2sin(2x)cos(2x) = 0 sin(2x)[1 + 2cos(2x)] = 0 sin(2x) = 0 or 2cos(2x) = -1 -> cos(2x) = -1/2 when sin(2x) = 0 2x = 0, pi, 2pi, 3pi x = 0, pi/2, pi, 3pi/2 when cos(2x) = -1/2 2x = 2pi/3, 4pi/3, 8pi/3, 10pi/3 x = pi/3, 2pi/3, 4pi/3, 5pi/3 so x = 0, pi/2, pi, 3pi/2 , pi/3, 2pi/3, 4pi/3, 5pi/3 @jim_thompson5910 is thsi correct?

6. Reaper534

sin(2x) = sin(4x) sin(2x) = sin(2*2x) sin(2x) = 2sin(2x)cos(2x) 2sin(2x)cos(2x) - sin(2x) = 0 sin(2x) * (2cos(2x) - 1) = 0 sin(2x) = 0 or cos(2x) = 1/2 x = 0 + n•π/2, π/6 + n•π, 5π/6 + n•π x = 0, π/6, π/2, 5π/6, π, 7π/6, 3π/2, 11π/6, 2π

7. TheKing

As the king I demand you take your sluttish Profile Picture off and put something more holy. What would your parents say.

8. AFleming42

a. π/6 , π/2 , 5π/6 , 7π/6 , 3π/2, 11π/6 b. 0, π/6 , π/2 , 5π/6 , π, 7π/6 , 3π/2, 11π/6 c. 0, 2π/3, 4π/3 d. 0, π/3, 2π/3, π, 4π/3, 5π/3

9. Reaper534

as reaper i sujuest u shh or die

10. TheKing

My lord, You people can't take a joke.

11. Reaper534

i was jst kiddn

12. Reaper534

@AFleming42 dose that help u at all??

13. TheKing

Oh, I wasn't that is a very sluttish picture. Parents you watch what there kids wear these days.

14. Reaper534

15. AFleming42

How did you get that answer @Reaper534 ?

16. Reaper534

by the power of google hahaha

17. AFleming42

Alright well I'll take google's word on it and hope for the best!

18. AFleming42

thanks mucho(:

19. TheKing

20. TheKing

21. jim_thompson5910

Lukecrayonz you are correct, so that would make the answer choice B

22. AFleming42

In that case thank you again @jim_thompson5910 !

23. jim_thompson5910

didn't do much, Lukecrayonz did all the work really

24. AFleming42

good job @Lukecrayonz (: <3

25. Lukecrayonz

thanks cutie can i get your number

26. AFleming42

message me(;

27. Reaper534

ernies back

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