If `x=acosn t-bsinn t` and `(d^2x)/(dt^2)=lambdax` , then find the value of `lambda` .

If x=a cos nt-b sin nt and (d^(2)x)/(dt^(2))=lambda x then find the value of lambda.

If x=acosn t-bsinn t , then find (dx)/(dt)

If x Aos 4t+Bsin4t then (d^(2)x)/(dt^(2)) =

If x= A cos 4t + B sin 4t , then (d^(2)x)/(dt^(2))=

If x^2=t^2+! then find (d^2x)/(dt^2)

If x=A cos 4t+B sin4t, then (d^(2)x)/(dt^(2)) is equal to

If x=A cos 4t+B sin4t, then (d^(2)x)/(dt^(2)) is equal to

If x=cos t+(log tan t)/(2),y=sin t, then find the value of (d^(2)y)/(dt^(2)) and (d^(2)y)/(dx^(2)) at t=(pi)/(4)

If x=cos t+(log tan t)/(2),y=sin t, then find the value of (d^(2)y)/(dt^(2)) and (d^(2)y)/(dx^(2))a=(pi)/(4)

phi(x)=int_(1/x)^( sqrt(x))sin(t^(2))dt, then find the value of phi'(1)