Lesson : Vectors
If the vector are equal in magnitude and angle between them in θ . i.e, A = B .Then Resultant value is ?
Ans : R = 2A cos θ/2
Derive the answer !!
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Answer:
R=√A^2+B^2+2ABcos©
R=√A^2+A^2+2A^2cos©
R=√2A^2+2A^2cos©
R=√2A^2(1+cos©)
R=√2A^2×2sin^2©/2
R=√4A^2sin^2©/2
R=2Asin©/2
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