AP EAMCET202120 Aug 2021Evening ShiftMathematicsVector AlgebraActual
Let u → and v → be two non-zero vectors with the intermediate angle 45 ° . Then | u → × v → | =
Options
- A| u → | | v → |
- B2 | u → | | v → |
- Cu → · v →
- D| u → | + | v → |
Correct answer
C. u → · v →
Step-by-step solution
Given that, θ = 45 ο As we know that | u → × v → | = u → v → sin θ   &   u → · v → = u → v → cos θ | u → × v → | = u → v → sin 45 ο ⇒ | u → × v → | = u → v → 2 ⇒ | u → × v → | = u → v → cos 45 ο ⇒ | u → × v → | = u → · v →