African Journal of Mathematics and Mathematical Sciences

African Journal of Mathematics and Mathematical Sciences ISSN: 3821-435x Vol. 2 (1), pp. 023-037, January, 2014. © International Scholars Journals 

Full Length Research Paper

Christ-Obimba tangent, permutation, sequence and series rules in Calculus

Obimba Kelechukwu Clarence

Department of Biochemistry, School of Science, Federal University of Technology Owerri, P.M.B. 1526, Owerri. Nigeria.  E-mail:; Tel. 07034851899 

Accepted 02 January, 2014


The aim of this study is to develop a convenient Tangent rule that could be used for determining the area and lengths of sides of a triangle, and also to develop differentiation and integral calculus rules/formulae based on permutation and geometric progression. Christ-Obimba Calculus Rule 1 could be used in determining further/higher derivatives of a function, directly from the parent function, without recourse to the consecutive, previous derivative.  For any triangle (    ) ABC,

 ,  , and .

a, b, and c are lengths of the sides of the triangle(    ) ABC (Christ-Obimba Tangent Rules).

known as Christ-Obimba Calculus Rules 1 and 2, respectively, could be used in calculus of differentiation, for determining derivatives, and further derivatives of mathematical functions. Parent /root mathematical functions, their consecutive derivatives, and further/higher derivatives, form the Christ-Obimba geometric progression sequence in calculus, given by :

The Christ-Obimba geometric progression series in calculus could be used to obtain all the derivatives, of the parent function of a finite series, without calculating individual derivatives, singly.  

m = the specific derivative (1st, or 2nd or 3rd…….or mth derivative).

n = index power to which the variable x is raised. e.g : x4 (n = 4).

a = constant = coefficient of the variable term in xn.

C = constant.

T1 =the first term of the geometric progression series of calculus = axn.

Ti = the dependent variable y; Td = the term in the independent variable x.                                                               

Key Words: Tangent, calculus, permutation, geometric progression series, derivatives.