1.

If k is the diameter of a circle and A is the area of a sector of the circle whose vertical angle is theta then (dA)/(dt) =

Answer»

`(k^(2))/(8)((d theta)/(dt))`
`((k^(2))/(4))((d theta)/(dt))`
`(d theta)/(dt)`
`k((d theta)/(dt))`

Answer :A


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