I)Find the angle between (I+j )and (j+k)?
II)Find the angle between (I+j) and (j-k)?
PLEASE ANSWER.I NEED IT URGENTLY...
I)Find the angle between (I+j )and (j+k)?
II)Find the angle between (I+j) and (j-k)?
PLEASE ANSWER.I NEED IT URGENTLY...
I did that in maths, using the dot product formula;
ab.cb = |ab||cb|cos A
Let ab be your vector i+j and cb your vector j+k. Their vectors are:
and
Now, the dot product, multiply the similar vectors (i direction with i direction, j with j, and k with k)and add them;
Solve for A, which is your angle. (you should have 30 degrees)
Do the same for the other one.
Hope it helped! :)
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