Trigonometry Examples

$\sec (θ) = - 2$

Step 1

To find the value of $\cos (θ)$ , use the fact that $\frac{1}{\sec (θ)}$ then substitute in the known values.

$\cos (θ) = \frac{1}{\sec (θ)} = \frac{1}{- 2}$

Step 2

Move the negative in front of the fraction.

$\cos (θ) = \frac{1}{\sec (θ)} = - \frac{1}{2}$