## anonymous one year ago Find all solutions in the interval [0, 2π). cos x = sin x x = three pi divided by four., five pi divided by four. x = pi divided by four., seven pi divided by four. x = three pi divided by four, seven pi divided by two x = pi divided by four, five pi divided by four. @sithsandgiggles

1. Nnesha

welll can you take a screenshot ?

2. anonymous

wont let me

3. Nnesha

why not ?

4. Nnesha

5. anonymous

i just can't.. others always help me without a screenshot or anything

6. Nnesha

alright...

7. anonymous

so can u help me?

8. anonymous

cuz i understand if u cant

9. Nnesha

yeah i'm going to help you i just wanted to make sure that equation is correct :-)

10. anonymous

alright i can retype it. it's cos x = sin x :-D

11. Nnesha

alright set it equal to one divide both sides by cos

12. anonymous

i dont know how to do any of this :/

13. anonymous

i'm so sorry

14. Nnesha

alright there is another easy way to find x values sin(x) = cos (x) in unit circle sin x = y coordinate cos (x) = x coordinate so you can replace sin (x) by y and cos (x) by x x=y now now at what angle x and y values are same ??

15. Nnesha
16. anonymous

45 degrees

17. Nnesha

yes there is one more !

18. anonymous

and 225 degrees

19. Nnesha

yep you can convert those two angles to radians by using this formula $\huge\rm d \times \frac{ \pi }{ 180 }$ or you can cheat(use unit circle )

20. Nnesha

:-)

21. anonymous

lol umm.. x = pi divided by four, five pi divided by four? @Nnesha

22. Nnesha

yes right

23. Nnesha

24. anonymous

WOOOOW! that was easier than i thought!

25. anonymous

thank you so much! may I please get a medal?

26. Nnesha

np :-)

27. anonymous

:)