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27 June, 19:59

Simplify: (sin θ - cos θ) - (sin θ + cos θ) ^2

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  1. 27 June, 22:43
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    = sin O - cos O - (sin^2 O + cos^2 O + 2 sin O cos O)

    = sin O - cos O - (1 + sin 2O)

    = sin O + cos O - sin 2O - 1
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