If x = a cos θ – b sin θ; y = a sin θ + b cos θ. Prove that x²+ y² = a² + b²

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Some Applications of Trigonometry

Prabhat Rajore · Accepted Answer

If x = a cos θ – b sin θ; y = a sin θ + b cos θ. Prove that x²+ y² = a² + b² - Wired Faculty

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