Paper 2 · Trigonometry
⏱ Tested in 1 exam question since 2016
Lesson 4 of 13
Trigonometry 4.3: Products to sums and differences/ Sums and differences to products
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- Convert sums like cos 6x − cos x into products using the page-15 factor formulae
- Convert products like 2 sin 100° sin 20° into sums or differences
- Scale the right-hand side by k/2 whenever the coefficient isn't the formula's 2
Most recent exam questions
- 2016 P2 Q3(a)
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