<meta http-equiv="refresh" content="1; url=/nojavascript/">

# Applications of Sum and Difference Formulas

## Sine, cosine, and tangent sum and difference formulas.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Applications of Sum and Difference Formulas

Solving equations and verifying identities with the sum and difference formulas

0
• Video

## Example: Simplify a Trig Expression Using the Sum and Difference Identities

Uses the different sum and difference trigonometric identities to simplify and evaluate functions.

0
• Practice
0%