first of all, it's "theta"
it's a lot better than some people though
i don't mind mispelling as much as some people though, but now you know, so you can spell it right next time
i think you can take it from there. Hint: think "special limit"
if you want to do it without L'Hopital's, power series is another method. too much work here though, i think
(do you know what L'Hopital's rule is? do you know how to do it using power series?)
is also a special limt (without the 2 in the denominator that is, but it doesn't matter, we can factor constants out).2) lim as theaata approaches 0 --> tan theata/2 theata
if you want to do it the hard way, you can note that: