Falling Behind in Studies? Join Our Performance Improvement Batch. Enroll For Free
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
sir i have a question in vector chapter that if vector a+b vector is equal to R vector and vector a+2b vector is perpendicular to vector a then find the value of b
Here we are given two lines a+ 2b and a which are inclined at 90 degrees.Thus applying dot product on these lines,a× (a+2b)=0a^2+2ab=0a^2=-2aba=-2bNow a+b=r-2b+b=rThus b+r=0. Or b=-r
Here we are given two lines a+ 2b and a which are inclined at 90 degrees.
Thus applying dot product on these lines,
a× (a+2b)=0
a^2+2ab=0
a^2=-2ab
a=-2b
Now a+b=r
-2b+b=r
Thus b+r=0. Or b=-r
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -