Q. What is the integral of the function f(x)=sin(2x)?2−1cos(x)+C21sin(x)+C2−1cos(2x)+C21sin(2x)+c
Identify Integral: Identify the integral that needs to be solved.We need to find the integral of f(x)=sin(2x).
Substitution Method: Use the substitution method to simplify the integral.Let u=2x, which implies that dxdu=2 or du=2dx. Therefore, dx=2du.
Rewrite in terms of u: Rewrite the integral in terms of u. The integral of sin(2x) with respect to x becomes (1/2) times the integral of sin(u) with respect to u, because dx=du/2.
Integrate sin(u): Integrate sin(u) with respect to u. The integral of sin(u)du is −cos(u)+C, where C is the constant of integration.
Substitute back: Substitute back the original variable.Since u=2x, we substitute back to get the integral in terms of x. So, the integral becomes (−21)cos(2x)+C.
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