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Question

In CH4 molecule, there are four CH bonds. If two adjacent bonds are in ^i+^j+^k and ^i^j^k direction, then find the angle between these bonds.
  1. sin1(13)
  2. cos1(13)
  3. cos1(13)
  4. sin1(13)


Solution

The correct option is B cos1(13)
Angle between vectors is
cosθ=A.B|A||B|=(^i+^j+^k).(^i^j^k)3.3=13
θ=cos1(13)

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