InterviewSolution
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InterviewSolution
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Let A,B,C be angles of triangles with vertex `A -= (4,-1)` and internal angular bisectors of angles B and C be `x - 1 = 0` and `x - y - 1 = 0` respectively. If A,B,C are angles of triangle at vertices A,B,C respectively then `cot ((B)/(2))cot .((C)/(2)) =`A. 2B. 3C. 4D. 6 |
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Answer» Correct Answer - D Angle between `x -1 =0` and BC is `(B)/(2) rArr tan.(B)/(2) =(1)/(2)` Angle between `x -y -1 =0` and BC is `(C )/(2) rArr tan.(C )/(2) =(1)/(3)` `rArr cot.(B)/(2) cot.(C )/(2) =6` |
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