Question:medium

If \(A\) and \(B\) are the roots of the equation \(2x^2-9x-16=0\), then \(9\sin^2(A+B)-\cos^2(A+B)=\)

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For root-based trigonometric questions, first use Vieta's formulas to obtain \(A+B\) or \(AB\), then substitute directly into the required expression.
Updated On: Jun 17, 2026
  • \(0\)
  • \(7\)
  • \(1\)
  • \(10\)
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The Correct Option is C

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