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