(sin theta + cos theta)2 - (sin theta -cos theta)2=
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Step-by-step explanation:
Question: (sin∅ + cos∅ - (sin∅ - cos∅
⇒ ∅ + 2. sin∅. cos∅ + ∅ - ∅ - 2. sin∅. cos∅ + ∅
⇒ ∅ + ∅ - ∅ + ∅
⇒ 1 - 1
⇒ 0
∴ (sin∅ + cos∅ - (sin∅ - cos∅ = 0
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