Question

Seca + tana=m find the value of m^2-1÷m

Answer 1

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The solution to your above posted question is illustrated in the above picture. I would therefore like to request you to have a look on the above picture. It will take you to the right method to solve these kinds of questions.Here,the answer which we get at the ultimate ending of the solution is 2 tan A. An important concept in terms of TRIGONOMETRIC IDENTITY you have to know which is :

${sec}^{2} \: theta \: - \: {tan}^{2} theta = 1$