sin 3): sin 9}: The graph with the equation y = m is shown in I a [Omani] by [ 2.2.1] viewing rectangle. 3. Describe the graph using another equation. b. 'v'eri'fy that the two equations are equal. a. Write another equation of the given graph. :| (Type an equation using )r as the variable} b. To verify that the two equations are equal, start with the numerator of The right side of the rst equation and apply the appropriate su mtrrproduct formula. sin 3x sin 9x: El (Do not simplify.) Now use the sum-to-product formula on the denominator of the right side ofthe rst equation. cos 3x cos 9x: :I {Do not simplify.) In the numerator and denominator, substitute the expressions found in previous steps. Apply an appropriate identity to simplify the expressions. C E (Simplify your answer.) The fraction from The previous step then simplifies to answer of part a using what? 0 A. Reciprocal Identity 0 B. Quotient Identity 0 C. Pythagorean Identity 0 D. EvenOdd Identityr