## anonymous 4 years ago If f(t)=8sec^2t-7t^2, find the antiderivative F(t). Then, if F(0)=0, find what F(1.2) would equal

1. anonymous

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

2. anonymous

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

3. anonymous

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. anonymous

are you still there Mark?

5. anonymous

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

6. anonymous

did you get -15.45 ?

7. anonymous

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

8. anonymous

9. anonymous

im sorry its 15.45

10. anonymous

Yeah, that worked. Thanks!

11. anonymous

ok yw, have fun :D