Applying the Sum & Difference Identities


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1. Which identity is this?

2. Evaluate.

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About This Quiz & Worksheet

If you have difficulties finding the sine, cosine and tangent of an angle, sum and difference identities can be of great help. This quiz will assess your ability to both use and recognize sum and difference identities.

Quiz & Worksheet Goals

This quiz asks you to do the following:

  • Evaluate using sum and difference identities
  • Recognize sum and difference identities
  • Recall what is used when dealing with special angles
  • Recall the number of sum and difference identities

Skills Practiced

  • Reading comprehension - understand the most relevant information from the lesson on sum and difference identities
  • Problem solving - use this information to evaluate using sum and difference identities
  • Information recall - remember the knowledge you have acquired about the unit circle

Additional Learning

There can be a lot to learn about sum and difference identities. If you wish to seek out more about them, read the lesson on Applying the Sum & Difference Identities, which will help you with the following objectives:

  • Define sum and difference identities
  • Recognize the different sum and difference identities
  • Define and understand the use of the unit circle
  • Explore examples of how to use sum and difference identities and the unit circle