The base BC of `DeltaABC` is fixed and the vertex A moves, satisfying the condition `cot.(B)/(2) + cot.(C)/(2) = 2 cot.(A)/(2)`, thenA. `b + c = a`B. `b + c = 2a`C. vertex A moves along a straight lineD. vertex A moves along an ellipse

The base BC of `DeltaABC` is fixed and the vertex A moves, satisfying

1.	The base BC of `DeltaABC` is fixed and the vertex A moves, satisfying the condition `cot.(B)/(2) + cot.(C)/(2) = 2 cot.(A)/(2)`, thenA. `b + c = a`B. `b + c = 2a`C. vertex A moves along a straight lineD. vertex A moves along an ellipse
Answer» Correct Answer - B::D Given `(s(s-b))/(Delta) + ((s-c))/(Delta) = (2s(s-a))/(Delta)` `rArr s-b + s - c = 2 (s-a)` `rArr b+c = 2a` So, locus of vertex A is an ellipse

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The base BC of `DeltaABC` is fixed and the vertex A moves, satisfying the condition `cot.(B)/(2) + cot.(C)/(2) = 2 cot.(A)/(2)`, thenA. `b + c = a`B. `b + c = 2a`C. vertex A moves along a straight lineD. vertex A moves along an ellipse

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