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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2015
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If vectors A=cosωˆi+sinωˆj and B=cosωt2ˆi+sinωt2ˆj are functions of time, then the value of t at which they are orthogonal to each other is :


( A ) t=π4ω
( B ) t=π2ω
( C ) t=0
( D ) t=πω
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