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InterviewSolution
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In cyclic quadrilateral ABCD (none of these being `90^(@)`), which of the following is not true ?A. tan A cot C = -1B. sec B cos D = -1C. cosec B sin D = 1D. none of these |
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Answer» Correct Answer - D `angle A = pi - C` `rArr tan A = - tan C` `rArr A cot C=-1` `angle B=pi-D` `rArr sec B=-sec D` `rArr sec B cos D=-1` `rArr angle B=pi-D` `rArr cosec B sin D = 1` |
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