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# Trigonometry Examples

Move to the left side of the equation by subtracting it from both sides.

To write as a fraction with a common denominator, multiply by .

Combine.

Multiply by .

Combine the numerators over the common denominator.

Apply the distributive property.

Multiply by .

Subtract from .

Subtract from .

Find all the values where the expression switches from negative to positive by setting each factor equal to and solving.

Add to both sides of the equation.

Subtract from both sides of the equation.

Solve for each factor to find the values where the absolute value expression goes from negative to positive.

Consolidate the solutions.

Set the denominator in equal to to find where the expression is undefined.

Subtract from both sides of the equation.

The domain is all values of that make the expression defined.

Interval Notation:

Interval Notation:

Use each root to create test intervals.

Test a value on the interval to see if it makes the inequality true.

Choose a value on the interval and see if this value makes the original inequality true.

Replace with in the original inequality.

The left side is greater than the right side , which means that the given statement is false.

False

False

Test a value on the interval to see if it makes the inequality true.

Choose a value on the interval and see if this value makes the original inequality true.

Replace with in the original inequality.

The left side is less than the right side , which means that the given statement is always true.

True

True

Test a value on the interval to see if it makes the inequality true.

Choose a value on the interval and see if this value makes the original inequality true.

Replace with in the original inequality.

The left side is greater than the right side , which means that the given statement is false.

False

False

Compare the intervals to determine which ones satisfy the original inequality.

False

True

False

False

True

False

The solution consists of all of the true intervals.

Convert the inequality to interval notation.