4. The distance between A(0, sin30) B(cos30,0) points is dash units A)1 B) 0 C) sin 30° D) cos 30°
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Answered by
1
Answer:
2
3
a
Let the points A(asin60
∘
,0)=A(
2
3
a
,0)
B(0,acos30
∘
)=B(0,
2
3
a
)
AB=
(0−
2
3
a
)
2
+(
2
3
a
−0)
2
=
(
4
3a
2
)+(
4
3a
2
)
=
2
3
a
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