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Q.

Two vectors a→ and b→ have equal magnitudes of 12 units. These vectors are making angles 30o and 120o with the x axis respectively. Their sum is r→. Find the x and y components of r→.

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a

b

c

d

answer is A.

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Detailed Solution

Here a = b =12 unitsX-component = a cos300 – b cos600Y-component = a sin300 + bsin 600
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