For Exercises 3–10, write the product as a sum or difference. (See Example 1)3. sin 5x sin 8x4. sin(-20) sin405. cos (-31)cos 7t3x6. cos -cos25x7. sin-cos448. sin 4acos 5a9. cos (-x) sin 2x10. cos 5xsin 2x

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Answered: For Exercises 3–10, write the product…

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter7: Analytic Trigonometry

Section7.3: The Addition And Subtraction Formulas

Problem 71E

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For Exercises 3–10, write the product as a sum or difference. (See Example 1) 3. sin 5x sin 8x 4. sin(-20) sin40 5. cos (-31)cos 7t 3x 6. cos -cos 2 5x 7. sin-cos 4 4 8. sin 4acos 5a 9. cos (-x) sin 2x 10. cos 5xsin 2x