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Expand the following using double angle formulae:

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Expand the following using double angle formulae:

(a) \(\cos 4 x\)
(b) \(\sin 6 \theta\)
(c) \(\cos 10 \theta\)
(d) \(\sin 50^{\circ}\)
(e) \(\cos 20^{\circ}\)
(f) \(\sin 70^{\circ}\)
(g) \(4 \sin 44^{\circ}\)
(h) \(2 \cos 22^{\circ}\)
(i) \(-\cos 86^{\circ}\)
in Mathematics by ♦ Diamond (75,025 points) | 9 views

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