Answer :
Answer:
Step-by-step explanation:
4y = 4 cos^2 x
dy/dx = -8 sin x cos x
d^2y / dx^2 = -8( sin x *-sin x + cos x * cos x)
= -8(cos^2x - sin^2 x)
= 8(sin^2 x - cos^2 x)
Answer:
Step-by-step explanation:
4y = 4 cos^2 x
dy/dx = -8 sin x cos x
d^2y / dx^2 = -8( sin x *-sin x + cos x * cos x)
= -8(cos^2x - sin^2 x)
= 8(sin^2 x - cos^2 x)