Common Trigonometry Mistakes
Example: Solving an Equation

The Goal

Solve the following equation for 0 ≤ x ≤ 2π:


The Mistake

Find the mistake:


(Roll the mouse over the math to see a hint in red)

The Correction


(Roll the mouse over the area above to see the correction in blue)

An Explanation

After cancelling the 2 (a common factor) from the equation, sin(x) should have been subtracted from both sides. Take care with steps like this!

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