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Answer» In a `triangleABC" if " cos A+ cos B+ cos C= (5)/(3)` then `(6r)/(R )` (P) 5 If a chord of length unity SUBTENDS an angle `theta` at the CIRCUMFERNCE of a circle whose radius = R then `4 R sin theta` is(Q) 3 In a `triangleABC` if `r= (1)/(3)` and `ALPHA,BETA,gamma` are length of altitudes then the value of `(1)/(alpha)+(1)/(beta)+(1)/(gamma)+2 =?` (R )2 Incircle of radius 4 cm of a `triangleABC` touches side BC at D. If BD= 6 cm, DC= 8 cm an `triangle` is area of triangle, then `sqrt(sqrt(triangle-3))=` (S) 4 Answer :A::B::C::D
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