MathematicsMedium45×since 2004Q5642If 0<x<π0 < x < \pi0<x<π and cosx+sinx=12,\cos x + \sin x = {1 \over 2},cosx+sinx=21, then tanx\tan xtanx is :A(1−7)4{{\left( {1 - \sqrt 7 } \right)} \over 4}4(1−7)B(4−7)3{{\left( {4 - \sqrt 7 } \right)} \over 3}3(4−7)C−(4+7)3- {{\left( {4 + \sqrt 7 } \right)} \over 3}−3(4+7)D(1+7)4{{\left( {1 + \sqrt 7 } \right)} \over 4}4(1+7)Check answerSkip