Question 39169
{{{ 1 + sin^2(A)*sec^2(A) = sec^2(A) }}}


Lets look at the right hand side, since this is the most complicated and so can be reduced.


{{{ 1 + sin^2(A)*sec^2(A) }}}
{{{ 1 + sin^2(A)*(1/(cos^2(A))) }}}
{{{ 1 + ((sin^2(A))/(cos^2(A))) }}}
{{{ 1 + tan^2(A) }}}
{{{ sec^2(A) }}}


jon.