Question

How do you prove `Sinx/Cosx+Cosx/Sinx = (Sin^2xCos^2x)/(CosxSinx)`?

Answer 1

I'm not sure but I think that the proof is not valid.
Because it turns out that,

`sinx/cosx+cosx/sinx= (sin^2x+cos^2x)/(cosxsinx) -=1/(cosxsinx)`

From the identity `sin^2x+cos^2x=1`