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Simplify the expression:

[tex]\[ \frac{\frac{\sin x}{\cos x}}{\sin ^2 x} \][/tex]


Sagot :

Sure, let's simplify the given expression step-by-step!

The expression given is:
[tex]\[ \frac{\frac{\sin x}{\cos x}}{\sin^2 x} \][/tex]

First, let's rewrite the expression to make it easier to simplify:
[tex]\[ \frac{\sin x / \cos x}{\sin^2 x} = \frac{\sin x}{\cos x \cdot \sin^2 x} \][/tex]

Next, let's see how we can simplify the denominator:
[tex]\[ \cos x \cdot \sin^2 x = \cos x \cdot (\sin x \cdot \sin x) = \cos x \sin x^2 \][/tex]

So now our expression looks like this:
[tex]\[ \frac{\sin x}{\cos x \sin^2 x} \][/tex]

Divide both the numerator and the denominator by [tex]\(\sin x\)[/tex]:
[tex]\[ \frac{1}{\cos x \sin x} \][/tex]

Recognize that using the double-angle identity for sine, [tex]\(\sin(2x) = 2\sin x \cos x\)[/tex], we have:
[tex]\[ \sin x \cos x = \frac{\sin(2x)}{2} \][/tex]

So:
[tex]\[ \cos x \sin x = \frac{\sin(2x)}{2} \][/tex]

Thus, our expression now becomes:
[tex]\[ \frac{1}{(\frac{\sin(2x)}{2})} \][/tex]

Invert the denominator and simplify:
[tex]\[ \frac{1}{\frac{\sin(2x)}{2}} = \frac{2}{\sin(2x)} \][/tex]

Therefore, the simplified form of the given expression is:
[tex]\[ \frac{2}{\sin(2x)} \][/tex]

So the final answer is:
[tex]\[ \frac{2}{\sin(2x)} \][/tex]
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