Question

f(x)=cos x+3sin x
M(П;2)

Answer 1

f(x)=cosx+3sinx
f(π/2)=cos(π/2)+3sin(π/2)=0+3*1=3
f'(x)=-sinx+3cosx
f'(π/2)=-sinπ/2+cosπ/2=-1