## Trigonometry (11th Edition) Clone

$$\frac{\sin\beta\tan\beta}{\cos\beta}=\tan^2\beta$$
$$A=\frac{\sin\beta\tan\beta}{\cos\beta}$$ $$A=\Bigg(\frac{\sin\beta}{\cos\beta}\Bigg)\tan\beta$$ - Quotient Identity: $$\frac{\sin\beta}{\cos\beta}=\tan\beta$$ Apply to $A$: $$A=\tan\beta\tan\beta$$ $$A=\tan^2\beta$$