Question 415178
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Hi
{{{ (1+sinx )/cosx + cosx/(1+sinx ) = 2/cosx }}}   |MULTIPLYING each term by cosx(1 + sinx)
{{{ (1+sinx)(1+ sinx)  + cosx*cosx  = 2(1+sinx)cosx/cosx}}} 
{{{ 1+2sinx + sinx^2  + cosx^2  = 2(1+sinx)}}}   |sinx^2 + cosx^2 = 1
        1+ 2sinx + 1 = 2 + 2sinx
        2 + 2sinx = 2 + 2sinx