1+sinx/1-sinx is equal to??

1 Answer
Sahar Mulla ❤
Apr 24, 2018

#(1+sinx)/(1-sinx )#

#=> ((1+sinx)(1+sinx))/((1-sinx )(1+sinx))# #["multiply and divide by "1+sinx]#

#=>(1+sinx)^2/(1-sin^2x )# #color(white)(wwwwwwwwwww# #[(a+b)(a-b) = a^2-b^2]#

#=>(1+sinx)^2/(cos^2x )# #color(white)(wwwwwwwwwww# #[sin^2x+cos^2x=1]#

#=>[(1+sinx)/(cosx )]^2#

#=>[secx +tanx]^2#

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