Question

Verify the identity using co-function identities for sine and cosine and basic identites
cot(pi/2 -x)=tanx

Answer 1

haha and what are you supposed to do with this? :>

Answer 2

I forgot to put what I was supposed to do, I just fixed it.

Answer 3

doesn't seem so bad, once you realise what cot really is... ^^

Answer 4

well, i got to (cos(pi/2-x))/sin(pi/2-x)=sinx/cosx but i dont know what to do next

Answer 5

sin/cos is tan, plain and simple.

basically, you've already done it :D

Answer 6

then I cosx/-sinx=sinx/cosx

Answer 7

wait what?
lol sinx/cosx is already equal to tanx, it's a basic identity ^^

Answer 8

i know, but, cos(pi/2-x)/(sin pi/2 -x) = cospi/2 + cos(-x) / sin pi/2 sin(-x)

Answer 9

seems like you're complicating things... cos(pi/2 - x) = sin(x) and sin(pi/2 - x) = cos(x)
these should suffice lawl

Answer 10

then cos pi/2= 0 cos -x= cosx sin pi/2=1 sin(-x)= -sinx

Answer 11

why do you get sin(-x) ?

Answer 12

That makes more sense, thank you!

Answer 13

oh ok... :>

Answer 14

I know what i did wrong, cosx=sin(pi/2 -x)
sinx=cos(pi/2 -x)

Answer 15

like I said, lol.

it's ok, as long as you saw your mistakes.. that's how we learn ^.^