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Question #4cc50

1 Answer

Jun 10, 2017

$\frac{cos x}{sec x} = {cos}^{2} x$ $cosx/secx=cos^2x$

Explanation:

Since $sec x = \frac{1}{cos x}$ $secx=1/cosx$ , you would get:

$\frac{cos x}{sec x} = \frac{cos x}{\frac{1}{cos x}} = cos x \cdot \frac{cos x}{1} = {cos}^{2} x$ $cosx/secx=cosx/(1/cosx)=cosx*cosx/1=cos^2x$

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