Question

topic: PROVING IDENTITIES -- new --
(SEE COMMENTS)
(trigonometry)

i'm practicing how to solve :)

Answer 1

1)

cot A + 2 cos A = [(2 sin A + 1)/(tan A)]


2)

[(2+csc x)/(sec x)] - 2 csc x = cot x


3)

(1)/(sec x - tan x) = sec x + tan x

Answer 2

cot A + 2 cos A = 1/tan(A) + 2cos(A) * sin(A)/sin(A) = 1/tan(A) + 2sin(A)/tan(A) =
(1 + 2sin(A))/tan(A)

Answer 3

@ranga how about #2 and #3?