Sum, Difference, and Double Angle Formulas.docx - Two-angle Formulas and Other Related Formulas In the applications of trigonometry a set of formulas

Sum, Difference, and Double Angle Formulas.docx - Two-angle...

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Two-angle Formulas and Other Related FormulasIn the applications of trigonometry, a set of formulas involving two angles or real numbers or multiples ofa single angle or real number is often required. Listed below are formulas for addition, subtraction and double-angles for sine, cosine, and tangent.Sum and difference formulas can enable you to do the following.1. Find exact values of trigonometric functions involving sumsor differencesof special angles2. Evaluate trigonometric expressions.3. Verify / prove trigonometric identities.4. Rewrite trigonometric expressions as algebraic expressions.5. Solve trigonometric equations. . Formulas: In words:

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