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Formulas for Trigonometric Functions: Sum/Difference, Double/Half-Angle, Prod-to-Sum/Sum-to-Prod (Professor Dave Explains) View | |
Sum and Difference Identities for Tangent (Mathispower4u) View | |
Sum and Difference Formulas and Identities of Tangent (Trigonometry) - Number Sense 101 (Number Sense 101) View | |
Proof of the tangent angle sum and difference identities (Khan Academy) View | |
Proof of the Sine, Cosine, and Tangent Sum and Difference Identities (Symplit Math) View | |
Trig Identities: Sum and Difference for Sine and Tangent (SuperMathPrincess) View | |
Sum and Difference Identities for Sine (Mathispower4u) View | |
Trig: Sum and Difference Identities for Sine and Tangent (frewizdum) View | |
Sum and Difference Identities for Sine and Tangent part 1 (J. Hill) View | |
Using the Sum and Difference Identities for Sine, Cosine and Tangent, Ex 1 (Patrick J) View |