jee_main_2025_07_april_morning - Vector Algebra Topics

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QUESTION #69 Dot and Cross Products
Let the angle θ, 0 < θ < (π)/(2) between two unit vectors a and b be ⁻¹( √(65)9) . If the vector c = 3 a + 6 b + 9( a × b) , then the value of 9( c · a) - 3( c · b) is
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JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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