P=A+B and Q=A-B.if magnitude of p and q are equal what is angle between a and b
Answers
Answered by
1
Answer:
180
Explanation:
is it correct. as long as I understand that it seems to be correct
Answered by
0
Answer:
90 degrees
Explanation:
lA+Bl = lA-Bl
lA^2+B^2+2AB cos thetal=lA^2+B^2-2AB cos thetal
On cancelling A^2and B^2 on both sides we get
4AB cos theta =0
Sending 4AB to the zero side we again get,
cos theta = 0
It means,
theta = 90 degrees
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