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Question

# Verify that each equation is an identity.$\cos 2 \theta=\frac{2-\sec ^2 \theta}{\sec ^2 \theta}$

Solution

Verified
Step 1
1 of 2

To demonstrate the given expression, we will use the following identity:

\begin{align} \cos 2\theta&=2\cos^2\theta - 1\, . \end{align}

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