Verify the identity.
cot(x-pi/2)=-tan x

Question

Verify the identity. 
cot(x-pi/2)=-tan x

supie · Answer

@darkknight

haz · Answer

$$\cot(x-\frac{ \pi }{ 2 })=-\tan x$$

darkknight · Answer

are we trying to verify if this is a trig identity or not?

haz · Answer

yes

darkknight · Answer

ok im assuming you are in at least precalc, so use this https://calcworkshop.com/pdf/trig-identities-cheatsheet.pdf to refer to all of the basic trig identities, we use these to see if your identity is correct

haz · Answer

i have some of those but i just dont know where to start

darkknight · Answer

im in class rn, can you wait like an hour or so?

haz · Answer

sure, thank you

darkknight · Answer

np

jhonyy9 · Answer

i think will help you use

$$\cot x = \frac{ \cos x  }{ \sin x  } and \tan x = \frac{ \sin x  }{ \cos x  }$$

jhonyy9 · Answer

or using this formula will help you

Cot(A-B) = (CotACotB+1)/(CotB-CotA)

jhonyy9 · Answer

remember that

Cotθ = 1/tanθ

jhonyy9 · Answer

and you need to know again that cot(pi/2) = 0