1.

AL, BM and CN are perpendicular from angular points of a triangle ABC on the opposite sides BC, CA and AB respectively. Delta is the area of triangle ABC, (r ) and R are the inradius and circumradius. IF areas of Delta 's AMN, BNL and CLM are Delta_(1), Delta_(2)and Delta_(3) respectively, then the valur of Delta _(1)+Delta_(2)+Delta _(3) is

Answer»

`DELTA (2+2 COS A cos B cos C)`
`Delta(2+ 2 SIN A sin B sin C)`
`Delta (1-2 cos A cos B cos C)`
`Delta (1-2 sin A sin B sin C)`

ANSWER :C


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