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Calculate the power $e^{-20}$
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$\int2.06\times 10^{-9}\cos\left(x\right)dx$
Learn how to solve trigonometric integrals problems step by step online. Solve the trigonometric integral int(e^(-20)cos(x))dx. Calculate the power e^{-20}. The integral of a function times a constant (0) is equal to the constant times the integral of the function. Apply the integral of the cosine function: \int\cos(x)dx=\sin(x). As the integral that we are solving is an indefinite integral, when we finish integrating we must add the constant of integration C.