Identify all values of the variable that make the function undefined
Exclude values that cause division by zero
Exclude values that make an even root of a negative number
Exclude values that make the inside of a logarithm less than or equal to zero
Check for restrictions from trigonometric functions such as tangent, cotangent, secant, and cosecant
Check for restrictions from inverse trigonometric functions
Combine all restrictions
Write the remaining values as the domain