If acosθ + bsinθ = 3 and asinθ - bcosθ = 4, then a² + b² has the value : (1) 25...| Doubtify JEE

If acosθ + bsinθ = 3 and asinθ - bcosθ = 4, then a² + b² has the value :
(1) 25 (2) 14 (3) 7 (4) 15

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