3. यदि a.b = 0 हो तो axb] निम्न में स�

1.	3. यदि a.b = 0 हो तो axb] निम्न में सेकिसके बराबर है ?(A) शून्य (B) \|ab](C) इकाई (D) JEET
Answer» AxB =ABsin theta.So whenAxB=0 then theta is also 0° as AxB= 0 => ABsin theta =0 => Sin theta = 0 => theta = 0°now A.B = 0cos theeta = 0sin 90= 1so answer 1 second part B is correct answer 1 is the right answer (b) is a good answer

3. यदि a.b = 0 हो तो axb] निम्न में सेकिसके बराबर है ?(A) शून्य (B) |ab](C) इकाई (D) JEET

Answer»

AxB =ABsin theta.So whenAxB=0 then theta is also 0° as

AxB= 0

=> ABsin theta =0

=> Sin theta = 0

=> theta = 0°now A.B = 0cos theeta = 0sin 90= 1so answer 1

second part

B is correct answer

1 is the right answer

(b) is a good answer