Integrate 5cos(3x - 1) with respect to x

Firstly, we may simplify the expression by factoring out any constants. In this case 5 can be factored out. 

5 ∫ cos(3x-1) dx 

For the integrand cos(3x -1), we can use a simple u-substitution. Where u = 3x -1 and du = 3dx. 

Our integral is then simplified to 5 ∫ cos(u) du/3

The integral of cos(u) is equal to sin(u)

And therefore the solution becomes: (5/3)*sin(u) + constant

Subsituting for u: (5/3)*sin(3x-1) + constant

RM

Related Maths A Level answers

All answers ▸

Derive the following with respect to x1: y=(x1*x2)/(x1+x2).


Find the antiderivative of the function f(x)=cos(2x)+5.


Use Simpson's rule with 5 ordinates (4 strips) to find an approximation to "integral between 1 and 3 of" 1/sqrt(1+x^3) dx giving your answer to three significant figures.


Find dy/dx when y=(3x-1)^10