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likenike


1. $sin^2 2x - 2sin^2 x + 2 = 0$
2. $(2sinx-1)(sinx+cosx)=1$
3.$(1+2cosx)^2.sinx=1 + sinx + cosx$
4. $tanx+cos2x=1$
5. $sin^3 x + cos^3 x = cosx$
Tks nha.
2. $(2sinx-1)(sinx+cosx)=1$
3.$(1+2cosx)^2.sinx=1 + sinx + cosx$
4. $tanx+cos2x=1$
5. $sin^3 x + cos^3 x = cosx$
Tks nha.
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