\int_{0}^{\frac{\pi}{4}} \cos \left(3x + \frac{\pi}{4}\right) dx =
Added by Nicole S.
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First, let's rewrite the integral as: ∫ 4 Cos (4zx) dx Show more…
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Test exercise
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Find the reduction formula for the integral: ∫ cosⁿ(4 x) dx. Select the correct answer. 1/4n cos(4 x)ⁿ⁻¹ sin(4 x) - (n-1)/n ∫ cosⁿ⁻²(4 x) dx 1/4n cos(4 x)ⁿ⁻¹ sin(4 x) + (n-1)/n ∫ cosⁿ⁻²(4 x) dx none of these 1/4n cos(4 x)ⁿ⁻¹ sin(4 x) + (n-1)/n ∫ cosⁿ⁻¹(4 x) dx 1/4n cos(4 x)ⁿ sin(4 x) + (n-1)/n ∫ cosⁿ⁻¹(4 x) dx
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