prove if one angle subtended by two chords of a circle equal the chords are equal
prove if one angle subtended by two chords of a circle equal the chords are equal
ABCD is a cyclic quadrilateral whose diagonals intersect at point E. If angle DBC = 70, angle BAC is 30, find angle BCD. Further. if AB=BC, find angle ECD.
if the ratio of the 11th term of an A.P. to its 18th term is 2:3 then find the ratio of the sum of the first five terms to the sum of its first 10 terms