Question

1 + cos square divided by 1 minus cos squared equals to 1 + cos theta by 1 minus Cos 2 theta

Answer 1

first L.H.S.

1+COS²Q/1-COS²Q ==>[1+COSQ][1+COSQ] / [1-COSQ][1+COSQ]

==> [1+COSQ] / [1-COSQ]

NOW R.H.S

[1+COSQ] / [1-COSQ] ==> [1+COSQ] /  [1-COSQ]

===>  SO R.H.S = L.H.S