## stottrupbailey Group Title If f(t)=8sec^2t-7t^2, find the antiderivative F(t). Then, if F(0)=0, find what F(1.2) would equal one year ago one year ago

1. stottrupbailey Group Title

So for my antiderivative I got, $8\tan(t)-\frac{ 7 }{ 3 }t^3+C$

2. stottrupbailey Group Title

but for some reason I'm not getting the right answer for F(1.2)

3. stottrupbailey Group Title

I found that since F(0)=0, then that must mean C=0. And then I pluged in 1.2 for the t's in the antiderivative and got -4.032 but the webwork says my answer's wrong, so I'm confused

4. stottrupbailey Group Title

are you still there Mark?

5. mark_o. Group Title

yeah seems you did good but in you calculator did you set up in radian mode

6. mark_o. Group Title

did you get -15.45 ?

7. stottrupbailey Group Title

yes, I did. So I'm not sure what the issue is. No, I didn't get that. I got -4. something

8. stottrupbailey Group Title

9. mark_o. Group Title

im sorry its 15.45

10. stottrupbailey Group Title

Yeah, that worked. Thanks!

11. mark_o. Group Title

ok yw, have fun :D