Math, asked by jeewan221b, 9 months ago

1/secA-tanA - 1/cosA = 1/cosA - 1/secA+tanA​

Answers

Answered by mysticd
2

Answer:

 LHS =\frac{1}{secA - tanA} - \frac{1}{cosA}

 =\frac{secA+tanA}{(secA - tanA)(secA+tanA)} - \frac{1}{cosA}

 = \frac{secA + tanA}{sec^{2}A - tan^{2}A} - \frac{1}{cosA}

 = \frac{secA + tanA}{1} - secA

 = secA + tanA - secA

 = secA - ( secA - tanA )

 = sec A - \frac{secA-tanA)(secA+tanA)}{(secA+tanA)}

 = secA - \frac{ sec^{2}A-tan^{2}A}{(secA+tanA)}

 = \frac{1}{cosA} - \frac{1}{(SecA+tanA)}

 = RHS

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