(x+ 1)^a=a*x+ 1
e^x=x+ 1
a^x=x*lna+ 1
cosx= 1-x^2/2
Lncosx = ln (1-1+cosx) = ln (1-x2/2) =-x2/2 or cosx- 1.
(cosx)^2=( 1-x^2/2)^2= 1-x^2
Being good at mathematics is suitable for this major.
1. Mathematics and Applied Mathematics
Mathematics and applied mathematics majors train