OpenStax, Algebra and Trigonometry 2e §9.2 Sum and Difference Identities · Exercise 43 · Trigonometry · Compound & multiple angles

Sum and Difference Identities · Exercise 43

Find the exact value algebraically, and then confirm the answer with a calculator to the fourth decimal point.

$s in (195°)$

~8 minWritten answer · compare with the solution

OpenStax, Algebra and Trigonometry 2e · §9.2 Sum and Difference Identities · Exercise 43

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