Soal tantangan identitas trigonometri. Buktikan identitas trigonometri berikut: [tex]\displaystyle \frac{1-2\sin^2 x \cos^2 x}{\sin x \cos x}=\frac{\tan^3 x}{1+
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Soal tantangan identitas trigonometri. Buktikan identitas trigonometri berikut:
[tex]\displaystyle \frac{1-2\sin^2 x \cos^2 x}{\sin x \cos x}=\frac{\tan^3 x}{1+\tan^2 x}+\frac{\cot^3 x}{1+\cot^2 x}[/tex]
[tex]\displaystyle \frac{1-2\sin^2 x \cos^2 x}{\sin x \cos x}=\frac{\tan^3 x}{1+\tan^2 x}+\frac{\cot^3 x}{1+\cot^2 x}[/tex]
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