Question

If you help, I'll give you a medal :D
Verify the identity. cot(x- pi/2) = -tan x

Answer 1

thats easy i will help

Answer 2

Thank you sooooooo much!!

Answer 3

cot(x-y)=cotx.coty+1/coty-cotx

Answer 4

put x=x and y=pi/2

Answer 5

this gives \[\cot(x-\pi/2)=cotx.\cot(\pi/2)/\cot(\pi/2)-cotx\]

Answer 6

ok?

Answer 7

there is a '+1' in the numerator i forgot to type

Answer 8

ok

Answer 9

cot pi/2=0

Answer 10

this gives 1/0-cotx=-tanx

Answer 11

hence the proof

Answer 12

got it??

Answer 13

need more explanation??

Answer 14

I think I got it! Thank you!!!

Answer 15

be sure..

Answer 16

lol any doubts...ask me:)

Answer 17

ok, thank you :D

Answer 18

my pleasure:D