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

Question

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

are you still there Mark?

anonymous · Answer

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

anonymous · Answer

did you get
-15.45 ?

anonymous · Answer

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

anonymous · Answer

I typed your answer in and it said it's wrong

anonymous · Answer

im sorry its 15.45

anonymous · Answer

Yeah, that worked. Thanks!

anonymous · Answer

ok yw, have fun :D