y=4sin(kx) write down dy/dx.
let u=kx,du/dx=ky= 4 sin(u)dy/du= 4cos(u)
dy/dx= du/dx*dy/du = 4kcos(u) =4kcos(kx)
WH
Related Maths A Level answers
All answers ▸Determine whether the line with equation 2x+ 3y + 4 = 0 is parallel to the line through the points with coordinates (9, 4) and (3, 8).
Integrate (x+2)/((x+5)(x-7)) using partial fractions between the limits 5 and -2, giving your answer to 3sf
Differentiate x^x
The line AB has equation 3x + 5y = 7. Find the gradient of line AB.