Express \( \sin 5x \sin 3x \) as a sum of two trigonometric ratios.
University of Ilorin MTH101 salang past question
- \(\frac{1}{2} [\cos 2x - \cos 8x]\)
- \(\frac{1}{2} [\sin 8x - \sin 2x]\)
- \(\frac{1}{2} [\cos 8x - \cos 2x]\)
- \(\frac{1}{2} [\sin 2x + \sin 8x]\)
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