Question

21
If y = ( sin 4x + 2 pie /3 )
then the value of dy/ dx is
(1) cos 4x + 2 pie/ 3
(2) 4 cos 4x + 2 pie / 3
(3) -cos 4x + 2 pie / 3
(4) - 4cos 4x + 2 pie / 3​

Answer 1

Explanation:

y = (sin4x + 2π/3)

dy/dx = (cos4x.4 + 0 )

= 4cos4x

(1) cos4x + 2π/3

dy/dx = 4cos4x

(2) 4cos4x + 2π/3

dy/dx = -16sin4x

(3) -cos4x +2π/3

dy/dx = 4sin4x

(4) -4cos4x +2π/3

dy/dx = 16sin4x