Question

derivative of cosa-cos2a/1-cosa​

Answer 1

Step-by-step explanation:

d/da(cos(a) - cos(2 a)/(1 - cos(a))) = -sin(a) + (sin(a) cos(2 a))/(1 - cos(a))^2 + (2 sin(2 a))/(1 - cos(a))

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