Originally Posted by GeoffP Q. Prove Cot^2t-Cos^2t=Cot^2t . Cos^2t
I have changed to sines/Cosines but seem to end up going round in circles. I have also tried working on both sides.
I think i need a combination of Cos^2t= 1- Sin^2t and Cot^2t = Cos^2t / Sin^2 t.
Any assistance appreciated.
Cheers Note that
Apply another identity, and you're done.