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kok jawabannya sama tapi soalnya beda sama soal identitasku,aneh contoh
(1+sin x)/(1-sin x)=(sec x+tan x)²
penyelesaianx»
(1+sin x)/(1-sin x). (1+sin x)/(1+sin x)=
(1+2sinx+sin²x)/cos²x=dipisah2 setiap pmbilang dngan pnyebutx»
(1/cos²x)+(2sinx/cos²x)+(sin²/cos²x)=sec²x+2secx tanx+tan²x=(secx+tanx)²