Question

Let A and B be the two vectors of magnitude 10 unit . If they are inclined to X-axis at angle 30 degree and 60 degree respectively. Find the resultant.

Answer 1

x-axis components add up to
10(cos30 + cos60) = 13.66

y axis components add up to
10(sin 30 + sin60) = 13.66

resultant magnitude = 19.32

The law of cosines could also have
been used.

Answer 2

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