MathematicsMedium66×since 2002Q4099cosec[2cot−1(5)+cos−1(45)]\left[ {2{{\cot }^{ - 1}}(5) + {{\cos }^{ - 1}}\left( {{4 \over 5}} \right)} \right][2cot−1(5)+cos−1(54)] is equal to :A7556{{75} \over {56}}5675B6556{{65} \over {56}}5665C5633{{56} \over {33}}3356D6533{{65} \over {33}}3365Check answerSkip