State parallelogram law of vectors addition.If the vectors 2i+2j-2k, 5i+yj+k and i+2j +2k are coplanar,then find the value of y?
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Answer:
( 2 I) +2j-2k
5i +yj + kb
I+2j +2kb
first we change the format in
2i+5i+1i = 7i
2j+yj +kb =2 yj` kb
Explanation:
`=2 or square
2y j (square) kb
2y =j square kb
Y =2 J SQUARE KB
is the answer
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