left side
(1/cos) /(1/cos -sin/cos)
1/(1 - sin)
right side
1/cos^2 + sin/cos^2
(1+sin)/(1-sin^2)
(1+sin) / [(1+sin)(1-sin) ]
1/(1-sin) remarkable :)
Prove that the equation is an identity.
sec x/(sec x -tan x)=sec^2 x +sec x tan x
1 answer