Year 12 Specialist (Unit 3 & 4)
Trigonometric functions
Sums and products of sines and cosines
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Questions
Question 1
19083
Express :
i) \(\sin 70^\circ \sin 30^\circ \) in the form \(\frac{1}{2}\left( {\cos A - \cos B} \right)\).
ii) \(\sin 70^\circ + \sin 30^\circ \) in the form \(2\sin A\cos B\).
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