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Part C - Communication [COMM - 20 marks] 1. Describe 2 differences and 1 similarity between y = - COST and y = cos x

Part C - Communication [COMM - 20 marks] 1. Describe 2 differences and 1 similarity between y = - COST and y = cos" x sin2x 2. Prove 1+cos (2x) - = tanx. vvv 3. Prove cos (+x)= sinx .vvv

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