precalc
posted by leslie .
prove the identity: (tan theta)/(csc theta) + 1/(sec theta)= sec theta

I will use x instead of theta for simpler typing
LS = sinx/cosx(sinx) + cosx
= (sin^2 x + sin^2 x)/cos x after I found a common denomiator of cos x
= 1/cos x
= sec x
= RS