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# Simplifying Trigonometric Expressions using Sum and Difference Formulas

## Simplify sine, cosine, and tangent of angles that are added or subtracted.

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Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
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## Simplifying Trig Expressions using Sum and Difference Formulas

by CK-12 //at grade

This lesson covers simplifying trig expressions using sum and difference formulas.

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## Simplifying Trigonometric Expressions using Sum and Difference Formulas Practice

by CK-12 //at grade
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## Simplifying Trig Expressions using Sum and Difference Formulas KWL Chart

by CK-12 //at grade

To activate prior knowledge, to generate questions about a given topic, and to organize knowledge using a KWL Chart.

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