SOLUTION: Please show me the method to prove identity here
{{{ (1-secx)/(1+secx) = (cosx-1)/(cosx+1) }}}
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Question 573724: Please show me the method to prove identity here
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
Cross-multiply
(\cos x - 1) = (1-\sec x)(\cos x+1))
Note that sec x cos x = 1. Replacing this, we have
This is true for all x (such that sec x is defined) so the original equation is also true.
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