Question

Hi all! I'd like to double check. "differentiate (cosx)/(1-sinx)"

Answer 1

So I used the quotient rule and got (-sinx+sin^2x+cos^2x)/(1-sinx)^2

Answer 2

correct!
and whats sin^2 x+cos^2x =... ?

Answer 3

after simplifying a bit

Answer 4

umm

Answer 5

gah identities

Answer 6

1? I cant remember

Answer 7

you got to remember them

Answer 8

yes, that = 1

Answer 9

ok

Answer 10

so 1-sinx

Answer 11

in the numerator

Answer 12

something getting cancelled ?

Answer 13

mhm so then its 1/(1-sinx)

Answer 14

yup!

Answer 15

:D

Answer 16

Ok, I think I should look over those identities again :)

Answer 17

thanks again as always ^_^

Answer 18

use them as many times as you can, you will automatically remember it
welcome ^_^