Applying the tangent identity: $\displaystyle\tan\left(\theta\right)=\frac{\sin\left(\theta\right)}{\cos\left(\theta\right)}$
Combine all terms into a single fraction with $\cos\left(x\right)$ as common denominator
Factor the polynomial $\sin\left(x\right)-\sin\left(x\right)\cos\left(x\right)$ by it's greatest common factor (GCF): $\sin\left(x\right)$
Apply the trigonometric identity: $\frac{\sin\left(\theta \right)}{\cos\left(\theta \right)}$$=\tan\left(\theta \right)$
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