Can any one help to find the limit of a function f=(2-2*cos​(x))/x^3*s​in(x)-cos(​x)/x*sin(x​) where x tending 0. correct ans is -5/12 but im getting zero.

Can any one help me to find the limit of a function f=(2-2*cos(x))/x^3*sin(x)-cos(x)/x*sin(x) where x tending 0. correct ans is -5/12 but i'm getting zero.

[Walter Roberson]

duplicates http://uk.mathworks.com/matlabcentral/answers/265549-can-any-one-help-to-find-the-limit-of-a-function-f-2-2-cos-x-x-3-sin-x-cos-x-x-sin-x-where-x-t