Prove cos2x-cos2y/cos2x+cos2y=tan(x+y)tan(y-x)

Prove: sin2x / 1 - cos2x = cotx My Attempt: LS: = 2sinxcosx / - 1 - (1 - 2sin^2x) = 2sinxco...

Prove the identity: 1-cos2x/sin2x = 1+tanx/1+cotx I simplified the RS to tanx. LS:(1-2cos²x+1)/...

Prove that cos2x=(1-tan^2x)/(1+tan^2x) I can't find any identities that can help me with this. I'...

Prove Identity: (1-cos2x/ tan x) = sin2x

prove that 1+sin2x-cos2x / sin2x+cos2x = tanx

prove sin2x+cos2x+1 tan(pi/4+x) ______________ = __________ sin2x+cos2...

If a=cos2x+isin2x ,b=cos2y +isin2y prove thAt a+b=2Cos(x-y)(cos(x+y)+isin(x+y))

if a=cos2x + sin2x and b=cos2y + isin2y.then find (a + b)

Prove that: (tan^2x +1)cos2x=2-sec^2x

A=cos2x+isin2x ,B=cos2y+sin2y hence prove that A-B/A+B=itan(x+y).

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