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4 from the pythagorean identity sin 2 cos 1...

Question: 4 from the pythagorean identity sin 2 cos 1...

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4. From the Pythagorean identity, (sin θ)2 + (cos θ)-1 , deduce that (sin θ)2-1. Solve this inequality to show that-1 sine 1. (Hint: move to one side and use split points.) The same argument shows that-1-cos θ < 1

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