Q. Integrate cosh(e3x) over the interval of −π to π
Recognize Problem: Recognize that the function cosh(e3x) is not a standard integral form, so we need to find a substitution or another method to integrate it.
Substitution Attempt: Let's try a substitution. Let u=e3x, then du=3e3xdx. We need to adjust for the 3, so dx=3e3xdu.
Integrate with Substitution: Substitute u and dx into the integral. The new integral is 31∫cosh(u)⋅(u1)du, with the limits of integration changing to e(−3π) and e(3π) after substituting x=−π and x=π.
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