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  3. 49 find the value of this expression cos 75 cos 15

49 Find the value of this expression cos 75 cos 15 The second step A...

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49 Find the value of this expression cos 75 cos 15 The second step A 2 cos 45 cos 30 2 sin 45 sin 30 2 sin 45 cos 30 OB C D 2 cos 45 sin 30

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