## hiralpatel121 2 years ago I need help with the problem attached.

1. hiralpatel121

2. mandonut

take the integral from 0 to 90

3. rainaby

ya take the integral!

4. hiralpatel121

I don't know how to do that.

5. rainaby

hahaa

6. Goten77

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

7. rainaby

ya this is the way!

8. Goten77

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

9. rainaby

now put the limits!

10. mandonut

you dont need c

11. Goten77

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

12. rainaby

13. hiralpatel121

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

14. rainaby

what? just put in the values!

15. hiralpatel121

I suck at trigs!

16. rainaby

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

17. Goten77

i feel like i did something wrong...

18. hiralpatel121

I have no idea..

19. rainaby

no its wrong

20. Goten77

oh i found my error now

21. rainaby

divide it by 4

22. rainaby

not 2

23. Goten77

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

24. rainaby

ya thats right!

25. hiralpatel121

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

26. Goten77

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

27. hiralpatel121

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