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Match derivatives in trigonometric composites

Integrate with respect to xx: (a) sin⁡(2−3x)\sin(2-3x); (b) sec⁡(3x)tan⁡(3x)\sec(3x)\tan(3x); (c) xcos⁡(3x2)x\cos(3x^2).

CJC · Lecture · Example 11

The Teacher matches each integrand to the composite sine, secant–tangent or cosine form.

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