OpenStax, Algebra and Trigonometry 2e §9.4 Sum-to-Product and Product-to-Sum Formulas · Example 6 · Trigonometry · Compound & multiple angles

Proving an Identity

Prove the identity:

$\frac{cos ( 4 t ) - cos ( 2 t )}{s in ( 4 t ) + s in ( 2 t )} = - t an t$

~5 minWritten answer · compare with the solution

OpenStax, Algebra and Trigonometry 2e · §9.4 Sum-to-Product and Product-to-Sum Formulas · Example 6

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