Question:
What is the maximum value of $\frac{1}{\sec \theta}$ ?
Solution:
The maximum value of $\frac{1}{\sec \theta}$ is 1 because the maximum value of $\cos \theta$ is 1 that is
$\frac{1}{\sec \theta}=\cos \theta$
$\frac{1}{\sec \theta}=1$
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