lim sin teta(sin2 teta)/1-cos teta
teta-->0
assume sin2 t means sin^2 t
which is (1 - cos^2 t)
which is (1-cost)(1+cos t)
the 1-cos t in the numerator now cancels the 1-cos t in the denominator so once again our problem goes away
teta-->0
which is (1 - cos^2 t)
which is (1-cost)(1+cos t)
the 1-cos t in the numerator now cancels the 1-cos t in the denominator so once again our problem goes away