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Activity
Varsity Tutors: Hotmath: Practice Problems: Sum and Difference Formulas Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Sum and Difference Formulas

For Students 9th - 10th Standards
Twenty problems are presented for practice working with sum and difference formulas for sine, cosine, and tangent.
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Unit Plan
Ck 12: Trigonometry: Tangent Sum and Difference Formulas Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Tangent Sum and Difference Formulas

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Here you'll learn to rewrite tangent functions with addition or subtraction in their arguments in a more easily solvable form.
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