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2. Algebraically prove the identity: secx sin x sin x cosx = cotx . State the restrictions. [3 marks] Solve the following equation algebraically for

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2. Algebraically prove the identity: secx sin x sin x cosx = cotx . State the restrictions. [3 marks] Solve the following equation algebraically for the given domain. Write your answers as exact values. [3 marks] 3. cos 2x + sin x - 1 = 0 for 0 S x S 2n

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