1 A 1 B 1 C 2 A 2 B 2 C 2 D 3 4 5 A 5 B 5 C 5 D 5 E 6 7 A 7 B 8 A 8 B 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49

Q. 8 A5.0( 2 Votes )

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Class 12th RD Sharma - Volume 2 24. Scalar or Dot Products

Answer :

Given Data: Two unit vectors inclined at an angle θ

Proof:

Since vectors are unit vectors

Now,

= 1+1+2×1×1×cosθ

= 2 + 2cosθ

= 2(1 + cosθ)

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