Question:medium

Find: \[ \int \frac{2 + \sin 2x}{1 + \cos 2x} e^x \, dx \]

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For integrals involving trigonometric expressions, simplify using standard identities before integrating.
Updated On: Jan 13, 2026
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Solution and Explanation

1. Simplify the trigonometric expression: Using the identities \( 1 + \cos 2x = 2\cos^2 x \) and \( \sin 2x = 2\sin x \cos x \), the numerator simplifies as follows: \[ \frac{2 + \sin 2x}{1 + \cos 2x} = \frac{2 + 2\sin x \cos x}{2\cos^2 x} = \frac{1}{\cos^2 x} + \frac{\sin x}{\cos x} = \sec^2 x + \tan x. \] 2. Rewrite the integral: The integral becomes: \[ \int \frac{2 + \sin 2x}{1 + \cos 2x} e^x \, dx = \int (\sec^2 x + \tan x) e^x \, dx. \] 3. Separate the terms: The integral can be split into two parts: \[ \int (\sec^2 x + \tan x) e^x \, dx = \int \sec^2 x e^x \, dx + \int \tan x e^x \, dx. \] 4. Solve the integrals: The first integral yields: \[ \int \sec^2 x e^x \, dx = e^x \tan x + C_1. \] The second integral yields: \[ \int \tan x e^x \, dx = e^x \ln|\sec x| + C_2. \] 5. Combine the results: Summing the results of the two integrals gives: \[ \int \frac{2 + \sin 2x}{1 + \cos 2x} e^x \, dx = e^x (\tan x + \ln|\sec x|) + C. \] Final Answer: \[ \boxed{e^x (\tan x + \ln|\sec x|) + C.} \]
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