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Question Number 190811 by otchereabdullai last updated on 12/Apr/23
Iftheanglebetweenthevectorsc=ai+2jandd=3i+jis45°,findthetwopossiblevaluesofa
Answered by safojontoshtemirov last updated on 12/Apr/23
c=(a;2)d=(3;1)cd=∣c∣∣d∣cosa3a+2=a2+4⋅59a2+12a+4=5a2+204a2+12a−16=0a2+3a−4=0a=−4a=1
Commented by otchereabdullai last updated on 12/Apr/23
Godblessyousir!
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