" 7."e^(-x)cos x

e^(-3x) cos x

Evaluate : int e^(4x)cos 7x dx .

Evaluate : int e^(2x)cos 7x dx .

If y=e^(x)cos x, prove that (dy)/(dx)=sqrt(2)e^(x)cos(x+(pi)/(4))

If y,=e^(x)cos x, prove that (dy)/(dx),=sqrt(2)e^(x)cos(x+(pi)/(4))

Solve the differential equation (dy)/(dx)-y log_(e)7=7^(sin x)(cos x-1)log_(e)7,y being bounded when x rarr oo

If e^(cos x) -e^(-cos x) = 4 , then the value of cos x, is

If e^(cos x) -e^(-cos x) = 4 , then the value of cos x, is

int_(0)^(pi)(e^(cos x))/(e^(cos x)+e^(-cos x))dx=