Question

Evaluate the integral using the Fundamental Theorem of Calculus.
See attachment.

Answer 1

integral of 4 cos x is

-4 sin x

evaluate

the answer is -4 sin (3pi/2) + sin(pi/2) whatever that is

Answer 2

oops

Answer 3

its 4 sin (x) i always mix up integration and differentiation

Answer 4

the answer is -8

Answer 5

Awesome, got the same thing.

Answer 6

Wait, I'm a bit confused about -4 sin (3pi/2) + sin(pi/2).
That ends up being, -5. :|

Answer 7

yes i accidentally did the derivative instead of integrating

Answer 8

integrating that gives you
4sin(x) + C

Answer 9

Yeee'

Answer 10

then 4sin(3pi/2) - 4sin(pi/2)

Answer 11

Thought so. Alright. I didn't see/read the previous post. :X