Question

Find the derivative of f(x) = cos x, a = pi/2

Answer 1

f'(x) = -sin x, now just substitute for x = a

Answer 2

x = a? you mean substitute pi/2?

Answer 3

Yes. Precisely :)

Answer 4

hey its that yo mama fight guy geerky42

Answer 5

????

Answer 6

And terenzreigns is correct

Answer 7

you see onegirl, there was a big yo mama fight yesterday

Answer 8

how did you get -sin x ?

Answer 9

divide by 3.14

Answer 10

u mean by pie?

Answer 11

i mean pi*