Calculus Examples

$\sec (θ) = \frac{1}{\cos (θ)}$

Start on the left side.

$\sec (θ)$

Apply the reciprocal identity to $\sec (θ)$ .

$\frac{1}{\cos (θ)}$

Because the two sides have been shown to be equivalent, the equation is an identity.

$\sec (θ) = \frac{1}{\cos (θ)}$ is an identity