tan theta /sec theta-1 - sin theta / 1+cos theta =2 cot theta
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Step-by-step explanation:
(tanO/SecO-1) - (SinO/1+CosO)
(SinO/1-CosO) - (SinO/1+CosO)
SinO(1+CosO)-SinO(1-CosO)/1-Cos²O
SinO(1+CosO-1+CosO) / Sin²O
2SinO*CosO/Sin²O
2CosO/SinO = 2CotO
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