Paper 2 · Trigonometry
⏱ Tested in 2 exam questions since 2015
Lesson 13 of 13
Trigonometry 4.12 – Trig Proof 8
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- Prove tan(A + B) = (tan A + tan B)/(1 − tan A tan B) from earlier proofs
- Start from the definition tan(A + B) = sin(A + B)/cos(A + B)
- Divide top and bottom by cos A cos B so every ratio collapses to a tan
Most recent exam questions
- 2022 P2 Q4(a)(i)
- 2015 P2 Q5(a)
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