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Given: cos (4?/9) cos(2?/9) sin (4?/9) sin(2?/9) 1. Identify the Trig identity that corresponds with the expression above. 2. Simplify and find the exact

Given: cos (4?/9) cos(2?/9) — sin (4?/9) sin(2?/9) 1. Identify the Trig identity that corresponds with the expression above. 2. Simplify and find the exact value. Show all work. Answers without justification will

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