If abcd is a cyclic
- if abcd is a cyclic quadrilateral then cosa+cosbu003d
- if abcd is a cyclic quadrilateral in which ad is parallel to bc
- if abcd is a cyclic quadrilateral then find the value of sina
- if abcd is a cyclic quadrilateral such that ab is a diameter
- if abcd is a cyclic quadrilateral then cos(180+a)+cos(180-b)+cos(180-c)-sin(90-d)
- if abcd is a cyclic parallelogram then angle a is
- if abcd is a cyclic quadrilateral such that 12 tan a
- if abcd is a cyclic quadrilateral
