If ABCD is a cyclic quadrilateral, then `tan A +tan C`=_________.

If ABCD is a quadrilateral then tan((A+B)/(4))

ABCD is a cyclic quadrilateral then angleA+angleC = ……….

If ABCD is a cyclic quadrilateral, then cos A+cos B is equal to

If ABCD is a cyclic quadrilateral, then prove that AC.BD=AB.CD+BC.AD

If ABCD is a cyclic quadrilateral,the value of (tan(A)/(2)(tan)(C)/(2)+(tan)(B)/(2)(tan)(D)/(2) is

If ABCD is a cyclic quadrilateral such that 12 tan A-5=0 and 5cos B+3=0 then the quadratic equation whose roots are cos C and tan D is

If ABCD is a cyclic quadrilateral, then cos A + cos B is equal to

If ABCD is a cyclic quadrilateral, then find the value of sinA + sinB -sinC - sinD