Precalculus
posted by Anonymous .
Prove that the equation is an identity.
sec x/(sec x tan x)=sec^2 x +sec x tan x

left side
(1/cos) /(1/cos sin/cos)
1/(1  sin)
right side
1/cos^2 + sin/cos^2
(1+sin)/(1sin^2)
(1+sin) / [(1+sin)(1sin) ]
1/(1sin) remarkable :)