Prove: 1-sinx/1+sinx=sec*2x-2secxtanx+tan*2x

prove 1/sinx-sinx=cos^2xcscx

prove lim x->0 sinx/x=1

How do I prove that sinx/sinx+cosx=tanx/1+tanx

prove(sinx/cosx+1)+(cosx-1/sinx)=0 Please help asap!!!!! PLEASE

secx/sinx-sinx/cosx=cotx

Prove that (2√3+3)sinx+2√3cosx lies between -(2√3+15) and (2√3+15)

Prove 1-cosx+sinx / 1+cosx+sinx =tan x/2

Limx-0 sinx/tanxsecx+tanx.sinx

Prove that (1+sinx-cosx/1+sinx+cosx)^2= 1-cosx/1+cosx

prove sin(2pi-x)=-sinx

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