Hi, please help me prove an identity..

\(Sin^2xtan^2x+cos^2xtan^2x=1-sec^2x\)

Guest May 26, 2019

#1**+1 **

LHS

factorise and it will fall out to tan^2 (x ) in just 2 lines

RHS

\(1-sec^2x\\ =1-\frac{1}{cos^2x}\\ =\frac{cos^2x-1}{cos^2x}\\ =\)

You should be able to finish if from there.

Melody May 26, 2019

#2**+1 **

Dearest Melody, it's juriemagic here...working from my phone....uhm, I made an error..it's supposed be \(1+sec^2x\)

Guest May 26, 2019