วิธีใช้ กฎ sin ,cos ตรีโกณ ม 5 ทำตามคลิปนี้

sin cos tan คืออะไร cos sin Ex , 2 Differentiate the functions with respect to x cos Let y = cos We need to find derivative of y, t cos sin Solution By Steps Step 1: Apply Cosine Addition Formula Use the formula cos = coscos

coso Ex , 2 Differentiate the functions with respect to x cos Let y = cos We need to find derivative of y, t