## anonymous 3 years ago I need help with the problem attached.

1. anonymous

2. anonymous

take the integral from 0 to 90

3. anonymous

ya take the integral!

4. anonymous

I don't know how to do that.

5. anonymous

hahaa

6. Goten77

$\int\limits_{0}^{\pi/2}x+ \cos(x)$

7. anonymous

ya this is the way!

8. Goten77

then you have $x ^{2}/2 + \sin(x) + c$

9. anonymous

now put the limits!

10. anonymous

you dont need c

11. Goten77

well ye u dont but i put it anyways just so it looks smart

12. anonymous

13. anonymous

I still don't realize what the next step will be after.

14. anonymous

what? just put in the values!

15. anonymous

I suck at trigs!

16. anonymous

its easy want to learn it this is just the basics!

17. Goten77

i feel like i did something wrong...

18. anonymous

I have no idea..

19. anonymous

no its wrong

20. Goten77

oh i found my error now

21. anonymous

divide it by 4

22. anonymous

not 2

23. Goten77

$((\pi/2)^{2}/2) + 1$

24. anonymous

ya thats right!

25. anonymous

So that's what I put down for the answer?

26. Goten77

it reduces to $(\pi ^{2}/4) + 1$

27. anonymous

Okay, thanks. I need help with just one more problem.