11/4 Simplifying Expressions Using Trigonometric Identities

$$\tan^2x + 1 = \frac{1}{\text{cos}^2x}$$

$$\text{sec}x = \frac{1}{\text{cos}x}$$

$$\text{csc}x = \frac{1}{\text{sin}x}$$

$$\text{cot}x = \frac{1}{\tan x}$$

$$\tan x \times \text{cos} x = \text{sin} x$$

$$\tan x = \frac{\text{sin} x}{\text{cos} x}$$

$$\text{sin} x \times \text{csc} x = 1$$

$$\text{sec}x = \frac{1}{\text{cos}x}, \text{csc}x = \frac{1}{\text{sin}x}$$

$$\text{cot} x \times \text{sec} x = \text{csc} x$$

$$\text{sin}(\frac{\text{pi}}{2} - x) = \text{cos} x$$