Two vectors m and n are defined by 3i+4j and n=2i-j. find the angle between m and n​

Question

Two vectors m and n are defined by 3i+4j and n=2i-j. find the angle between m and n​

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Thu Cúc 4 years 2021-07-21T20:28:42+00:00 2 Answers 11 views 0

Answers ( )

  1. Ben
    0
    2021-07-21T20:29:49+00:00
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    Answer:

    { \tt{m.n = |m| |n| \cos( \theta) }} \\ { \tt{ (3 \times 2) + (4 \times - 1) = (5)( \sqrt{5}) \cos( \theta) }} \\ { \tt{ \cos( \theta) = \frac{0.4}{ \sqrt{5} } }} \\ \theta = 79.7 \degree

  2. thienthi
    0
    2021-07-21T20:30:13+00:00
    Reply

    Answer:

    m.n=∣m∣∣n∣cos(θ)(3×2)+(4×−1)=(5)(5)cos(θ)cos(θ)=50.4θ=79.7°

    Step-by-step explanation:

    Above ANS is correct mark it as branliest ANS PLZ☺️

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