Question

sinx的导数是什么

Answer 1

f（x）=sinx
f’（x）=cosx
f（x）=sinx的导数是：f’（x）=cosx

Answer 2

sinx＋cosx
=√2(√2/2sinx+√2/2cosx)
=√2(sinxcos45+cosxsin45)
=√2sin(x+45)