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In a given figure, if AB = a, AC = 4 cm,...

In a given figure, if AB = a, AC = 4 cm, where O is centre of circle and a point D is on BC such that AD `_|_` BC then find length of OD?

A

1)`(4-a)/(4)`

B

2)`(16-a^(2))/(2sqrt(a^(2)+16))`

C

3)`(4a-16)/(16a-a^(2))`

D

4)`(2sqrt(a^(2)-16))/(16+a^(2))`

Text Solution

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