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## lala2 2 years ago HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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1. lala2

cos(pi theta)=-0.6

2. lala2

@phi @timo86m

3. lala2

|dw:1368834712766:dw|

4. lala2

please someone im very frusterated!

5. heyheyhelpme
6. geishaology

Im certain, no one is sure what your asking.

7. lala2

will someone please help me!

8. lala2

it has equal =-0.6

9. geishaology

your violating the COC boy. here. . .

10. geishaology

cos(pi theta) = -0.6 Eliminate the cosine from the left hand side. Take the inverse cosine of both sides: pi theta = 2.2143+2 pi n_1 for n_1 element Z or pi theta = 2 pi n_2-2.2143 for n_2 element Z Look at the first equation: Solve for theta. Divide both sides by pi: theta = 0.704833+2 n_1 for n_1 element Z or pi theta = 2 pi n_2-2.2143 for n_2 element Z Look at the second equation: Solve for theta. Divide both sides by pi: theta = 0.704833+2 n_1 for n_1 element Z or theta = 2 n_2-0.704833 for n_2 element Z

11. lala2

where did you get this?

12. lala2

@geishaology i dont understand this!

13. geishaology

I did it. I basically explained the equation in full detail lml.

14. lala2

whats n_1

15. geishaology

(n1)

16. lala2

what is that

17. geishaology

look, I will need a medal first, then I will explain more since you dont get it yet.

18. lala2

there you go

19. geishaology

Kay, what exactly dont you understand?

20. lala2

what all the n_1 are?

21. lala2

@geishaology

22. geishaology

Its n(sub 1)

23. geishaology

meaning, the (1) is on the side, below the (n). like the opposite of a squared or cubed.

24. geishaology

and it always equals (0).

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