be careful of the integral of cos(x) vs the derivative of cos(x)

Integral of cos(x) vs derivative of cos(x), MUST BE CAREFUL!
integrals by Edward Ezike,

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#blackpenredpen #math #calculus #apcalculus

[DanDart]

I always think about first principles, and the order of derivation going sin -> cos -> -sin -> -cos -> sin

[DigitalEliteGamer]

Thank you :). and i like the behind scenes xD

[victorkehinde]

If I'm to differentiate cosx, i will use first principle, but what if i want to integrate? is there any step ?