Evaluate .

Answer and explanation

Correct answer: D.

  1. Step 1: Use and repeated squaring, or polar form. Step 2. The result is -1. **Answer: . Why not the others:** : That does not follow from squaring and multiplying correctly. : That does not follow from squaring and multiplying correctly. : That does not follow from squaring and multiplying correctly.

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Evaluate (i) 6. | Singapore GCE A-Level