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See we have to find out the resultant here. First vector is given 20 units and second 10 units. (See the image) So by applying formula for resultant, R = (200 + 100 + 2× 20 × 10 × cos 60)^1/2 I am getting 10 underoot 6 but answer is 10 underoot 3. How?

See we have to find out the resultant here. 
First vector is given 20 units and second 10 units. (See the image)
So by applying formula for resultant,
R = (200 + 100 + 2× 20 × 10 × cos 60)^1/2
I am getting 10 underoot 6 but answer is 10 underoot 3. How?

Question Image
Grade:12th pass

1 Answers

Arun
25758 Points
4 years ago
Dear Aabha
 
square of 20  = 400
you have written incorrect
hope it helps
 
Regards
Arun (askIITians forum expert)

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