"2\\sin^2\\theta + 2\\cos^2\\theta -1 = 2*(sin^2\\theta + \\cos^2\\theta) - 1 = 2-1 =1"
for any value "\\theta"
hence the assumption "2\\sin^2\\theta + 2\\cos^2\\theta -1 = 0" is not true
Answer: The original hypothesis requiring proof is false
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