3. What is the distance between the points A(10 cos 0, 0) and B(0, 10 sin 6)? (a) 15 units (b) 10 units (c) 20 units (d) 1 unit
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Using distnace formula,
Distance between the given points
=
(0−10cos30
∘
)
2
+(10cos60
∘
−0)
2
=
100cos
2
30
∘
+100cos
2
60
∘
=
100(
2
3
)
2
+(
2
1
)
2
=
100(
4
3
+
4
1
)
=
100
=10 units
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