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Mathematics, 23.10.2021 16:50 blacee01

Giải phương trình
a)Sin4x+3cos2x
b)tanbìnhx+2/cotx-3
C)9cos4x-2cos2x=7

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Giải phương trình
a)Sin4x+3cos2x
b)tanbìnhx+2/cotx-3
C)9cos4x-2cos2x=7...

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