1.

A circle of area 20 sq. units is enteredat the point O. Suppose DeltaABC is inscribed in that circle and has area 8 sq. units. The central angles alpha, beta and gamma are as shown in the figure. The value of(sin alpha+sin beta+sin gamma) is equal to :

Answer»

`(4PI)/(5)`
`(3PI)/(4)`
`(2pi)/(5)`
`(pi)/(4)`

Answer :A


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