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What is general formula for finding sizes a, b and c of scalene triangle ABC knowing exradii r-a, r-b. r-c of escribed circles? A vector has direction angles α = 75° and β= 55° Find the value of γ and Find a vector that has those direction angles? What is the speed of a pool ball that lands 4.95 meters from the table s edge? Can we find out the depth of rock layer underneath soil using satellite images? Can i tan during winter?