Let u → and v → be two non-zero vectors with the intermediate angle 45 ° . Then | u →…

Let u and v be two non-zero vectors with the intermediate angle 45°. Then |u×v|=
  1. |u||v|
  2. 2|u||v|
  3. u·v
  4. |u|+|v|

Solution

Given that, θ=45ο

As we know that |u×v|=uvsinθ & u·v=uvcosθ

|u×v|=uvsin45ο

|u×v|=uv2

|u×v|=uvcos45ο

|u×v|=u·v

Asked in: AP EAMCET 2021 (20 Aug Shift 2)

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