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A vector of magnitude 10 units makes an angle $60 °$ with X- axis in XY plane . Then

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Its component along y axis is 5

Its component along z axis is always 0

vector is represented by $5 i - 5 \sqrt{3} j$

vector is represented by $5 i + 5 \sqrt{3} j$

answer is B, C, D.

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Detailed Solution

A) component along Y axis is $10 \sin 60 = 5 \sqrt{3}$

B) component along Z axis is $10 \cos 90 = 0$

C) vector is given by $10 \cos 60 i + 10 \sin 60 j = 5 i + 5 \sqrt{3} j$

D) vector is given by $10 \cos 60 - 10 \sin 60 j = 5 i - 5 \sqrt{3} j$

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