công thức nhân đôi/ba
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Last updated 4:58 PM on 7/10/26
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4 Terms
1
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sin 2a=
2sin a cos a=
2
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cos 2a=
cos²-sin² / 2cos²a-1 / 1-2sin²a
3
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tan 2a=
2tan a/1-tan² a
4
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1
1