determine if true or false

Question

the dy/dx of y=sec(cos(x)) is -sec(cos(x))tan(cos(x))sin(x)

a. true

b. false

Answer 1

y=sec(cos(x))

Find dy/dx

d(sec x)/dx = sec x tan x

d(cos x)/dx = -sin x

dy/dx = sec(cos x) tan(cos x) (-sin x)

True