Trigonometry Examples

$| y | = 4$

Step 1

Remove the absolute value term. This creates a $\pm$ on the right side of the equation because $| x | = \pm x$ .

$y = \pm 4$

Step 2

The complete solution is the result of both the positive and negative portions of the solution.

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Step 2.1

First, use the positive value of the $\pm$ to find the first solution.

$y = 4$

Step 2.2

Next, use the negative value of the $\pm$ to find the second solution.

$y = - 4$

Step 2.3

The complete solution is the result of both the positive and negative portions of the solution.

$y = 4, - 4$