Hi,

I just want to know if there is a difference between the derivative of sin x and sin x°, where x is in radians & x° is in degree.

My textbook says the derivative of sin x is cos x, if and only if x is in RADIANS. But now I am asked to work out the derivative of sin x°. I think d(sin x°)/dx shouldn’t equal to cos x° because x° is not in radians. If I am making a right point here, what is the derivative of sin x°?

Really need your help

Thank you!