Yes,because it is in CPT then, in IPCC Costing & finance then again in CA final Costing at very advance level. So, you must have knowledge of maths at least to a level by which you can clear these subjects.
Its not needed to affraid but you can easily cop up with maths with continous practice and review.
Don't worry I have cleared cpt without maths and also preparing for ipcc. I don't think there is a need of so much knowledge of maths. I am also weak in maths even may be more than you. But I have not faced any problem with this. So dn't worry and just learn calculations only which you face during your ca course.