Question

Verify the identity: secx+tan(-x)sinx=cosx
Please help

Answer 1

"verify" meaning prove?

Answer 2

Yes please.

Answer 3

tan(-x)=-tan x
put

Answer 4

Okay, now how do I use that?

Answer 5

remember that \[\sec x = \frac{1}{\cos x}\] and \[\tan x = \frac{\sin x}{\cos x}\]

Answer 6

replace those in your equation