Math, asked by jpjitendra4314, 6 hours ago

prove that (1/seca-1)-(1/seca+1)=2 cot^2a

Answers

Answered by sandy1816
8

 \frac{1}{seca - 1}  -  \frac{1}{seca + 1}  \\  \\  =  \frac{seca + 1 - seca + 1}{ {sec}^{2}a - 1 }  \\  \\  =  \frac{2}{ {tan}^{2} a}  \\  \\  = 2 {cot}^{2} a

Similar questions