Common Trigonometry Mistakes
Example: Simplifying a trigonometric expression |

Some problems provide the opportunity for more than one mistake. The Goal
Simplify the expression:
The Mistakes
Find the mistakes:
(Roll the mouse over the math to see a hint in red)
(Roll the mouse over the math to see a hint in red)
(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) Explanations
The first mistake contains mistakes in all three steps, each without obvious explanation. In the first step the variable y makes a cameo appearance. I see no logic to the second step, nor the third step, other than wishful thinking. |

Home Page |
Common Trigonometry Mistakes |
Privacy Policy |